ℹ️ Skipped - page is already crawled
| Filter | Status | Condition | Details |
|---|---|---|---|
| HTTP status | PASS | download_http_code = 200 | HTTP 200 |
| Age cutoff | PASS | download_stamp > now() - 6 MONTH | 1.2 months ago |
| History drop | PASS | isNull(history_drop_reason) | No drop reason |
| Spam/ban | PASS | fh_dont_index != 1 AND ml_spam_score = 0 | ml_spam_score=0 |
| Canonical | PASS | meta_canonical IS NULL OR = '' OR = src_unparsed | Not set |
| Property | Value |
|---|---|
| URL | https://www.collinsdictionary.com/dictionary/english/brownian-motion |
| Last Crawled | 2026-03-07 03:54:30 (1 month ago) |
| First Indexed | 2018-12-04 11:24:52 (7 years ago) |
| HTTP Status Code | 200 |
| Meta Title | BROWNIAN MOTION definition and meaning | Collins English Dictionary |
| Meta Description | 2 meanings: physics → another name for Brownian movement random movement of microscopic particles suspended in a fluid, caused.... Click for more definitions. |
| Meta Canonical | null |
| Boilerpipe Text | Brownian motion
in British English
(
ˈbraʊnɪən ˈməʊʃən
)
noun
Collins English Dictionary
. Copyright © HarperCollins Publishers
Brownian movement
in British English
(
ˈbraʊnɪən
)
or
Brownian motion
noun
Collins English Dictionary
. Copyright © HarperCollins Publishers
Word origin
C19: named after Robert
Brown
Examples of 'Brownian motion' in a sentence
Brownian motion
These examples have been automatically selected and may contain sensitive content that does not reflect the opinions or policies of Collins, or its parent company HarperCollins.
I moved out of the
doorway
and
stood
in the room with my
thoughts
in Brownian
motion
.
Robert Wilson
INSTRUMENTS OF DARKNESS
(
2002
)
Word lists with
Brownian motion
terms used in chemistry
Physics terms
Quick word challenge
Quiz Review
Question:
1
-
Score:
0
/
5
Which
physics term
am I?
either of two theories developed by Albert Einstein, the
special theory of relativity
, which requires that the laws of physics shall be the same as seen by any two different observers in uniform relative motion, and the
general theory of relativity
which considers observers with relative acceleration and leads to a theory of gravitation
Which
physics term
am I?
the part of the electromagnetic spectrum with a longer wavelength than light but a shorter wavelength than radio waves; radiation with wavelength between 0.8 micrometres and 1 millimetre
Which
physics term
am I?
a dynamic influence that changes a body from a state of rest to one of motion or changes its rate of motion. The magnitude of the force is equal to the product of the mass of the body and its acceleration
Which
physics term
am I?
the derived SI unit of electric capacitance; the capacitance of a capacitor between the plates of which a potential of 1 volt is created by a charge of 1 coulomb
Which
physics term
am I?
the time taken for half of the atoms in a radioactive material to undergo decay
Your score:
You may also like
Quick word challenge
Quiz Review
Question:
1
-
Score:
0
/
5
HOUSEHOLD
Drag the correct answer into the box.
dustpan
sideboard
vacuum cleaner
armchair
HOUSEHOLD
What is this an image of?
HOUSEHOLD
What is this an image of?
HOUSEHOLD
Drag the correct answer into the box.
double bed
washing machine
dishwasher
table
HOUSEHOLD
Drag the correct answer into the box.
cot
mop
dustpan
ironing board
Your score: |
| Markdown | 
[](https://www.collinsdictionary.com/ "Go to the homepage")
[TRANSLATOR](https://www.collinsdictionary.com/translator "Translator")
[LANGUAGE](https://www.collinsdictionary.com/dictionary/english "Language")
[GAMES](https://www.collinsdictionary.com/quiz/ "Games")
[SCHOOLS](https://schools.collinsdictionary.com/ "Schools")
[BLOG](https://blog.collinsdictionary.com/ "Blog")
[RESOURCES](https://www.collinsdictionary.com/resources "Resources")
[More](https://www.collinsdictionary.com/dictionary/english/brownian-motion)
[ ](https://www.collinsdictionary.com/assistant)
[English](https://www.collinsdictionary.com/dictionary/english "English")
[French](https://www.collinsdictionary.com/dictionary/english-french "French")
[German](https://www.collinsdictionary.com/dictionary/english-german "German")
[Italian](https://www.collinsdictionary.com/dictionary/english-italian "Italian")
[Spanish](https://www.collinsdictionary.com/dictionary/english-spanish "Spanish")
[Portuguese](https://www.collinsdictionary.com/dictionary/english-portuguese "Portuguese")
[Hindi](https://www.collinsdictionary.com/dictionary/english-hindi "Hindi")
[Chinese](https://www.collinsdictionary.com/dictionary/english-chinese "Chinese")
[Korean](https://www.collinsdictionary.com/dictionary/english-korean "Korean")
[Japanese](https://www.collinsdictionary.com/dictionary/english-japanese "Japanese")
[More](https://www.collinsdictionary.com/dictionary/english/brownian-motion)
[](https://www.collinsdictionary.com/assistant)
[Italiano](https://www.collinsdictionary.com/it/dizionario/inglese/brownian-motion)
[American](https://www.collinsdictionary.com/us/dictionary/english/brownian-motion)
[Português](https://www.collinsdictionary.com/pt/dictionary/english/brownian-motion)
[한국어](https://www.collinsdictionary.com/ko/dictionary/english/brownian-motion)
[简体中文](https://www.collinsdictionary.com/zh/dictionary/english/brownian-motion)
[Deutsch](https://www.collinsdictionary.com/de/worterbuch/englisch/brownian-motion)
[Español](https://www.collinsdictionary.com/es/diccionario/ingles/brownian-motion)
[हिंदी](https://www.collinsdictionary.com/hi/dictionary/english/brownian-motion)
[日本語](https://www.collinsdictionary.com/jp/dictionary/english/brownian-motion)
English
French
German
Italian
Spanish
Portuguese
Hindi
Chinese
Korean
Japanese
[Definitions]("Definitions") [Summary](https://www.collinsdictionary.com/english-language-learning/brownian-motion "Summary") [Synonyms]("Synonyms") [Sentences](https://www.collinsdictionary.com/sentences/english/brownian-motion "Sentences") [Pronunciation]("Pronunciation") [Collocations]("Collocations") [Conjugations]("Conjugations") [Grammar](https://grammar.collinsdictionary.com/easy-learning "Grammar")
Credits
[×]()
# Definition of 'Brownian motion'
## Brownian motion in British English
(ˈbraʊnɪən ˈməʊʃən [](https://blog.collinsdictionary.com/ipa-pronunciation-guide-ced/ "IPA Pronunciation Guide") )
noun
physics another name for [Brownian movement](https://www.collinsdictionary.com/dictionary/english/brownian-movement "Definition of Brownian movement")
Collins English Dictionary. Copyright © HarperCollins Publishers
## Brownian movement in British English
(ˈbraʊnɪən [](https://blog.collinsdictionary.com/ipa-pronunciation-guide-ced/ "IPA Pronunciation Guide") ) or Brownian motion
noun
[random](https://www.collinsdictionary.com/dictionary/english/random "Definition of random") movement of [microscopic](https://www.collinsdictionary.com/dictionary/english/microscopic "Definition of microscopic") [particles](https://www.collinsdictionary.com/dictionary/english/particle "Definition of particles") [suspended](https://www.collinsdictionary.com/dictionary/english/suspend "Definition of suspended") in a [fluid](https://www.collinsdictionary.com/dictionary/english/fluid "Definition of fluid"), caused by bombardment of the particles by [molecules](https://www.collinsdictionary.com/dictionary/english/molecule "Definition of molecules") of the fluid. First [observed](https://www.collinsdictionary.com/dictionary/english/observe "Definition of observed") in 1827, it provided strong [evidence](https://www.collinsdictionary.com/dictionary/english/evidence "Definition of evidence") in support of the [kinetic](https://www.collinsdictionary.com/dictionary/english/kinetic "Definition of kinetic") theory of molecules
Collins English Dictionary. Copyright © HarperCollins Publishers
Word origin
C19: named after Robert Brown
## Examples of 'Brownian motion' in a sentence Brownian motion
These examples have been automatically selected and may contain sensitive content that does not reflect the opinions or policies of Collins, or its parent company HarperCollins.
We welcome feedback: [report an example sentence](https://blog.collinsdictionary.com/contact-us/) to the Collins team. [Read more…](https://blog.collinsdictionary.com/how-do-we-create-our-corpus-examples/ "How were these examples chosen?")
I moved out of the [doorway](https://www.collinsdictionary.com/dictionary/english/doorway "Definition of doorway") and [stood](https://www.collinsdictionary.com/dictionary/english/stand "Definition of stood") in the room with my [thoughts](https://www.collinsdictionary.com/dictionary/english/thought "Definition of thoughts") in Brownian [motion](https://www.collinsdictionary.com/dictionary/english/motion "Definition of motion").
Robert Wilson INSTRUMENTS OF DARKNESS (2002)
## Word lists with Brownian motion
[terms used in chemistry](https://www.collinsdictionary.com/word-lists/chemistry-terms-used-in-chemistry#chemistry-terms-used-in-chemistry__1) [Physics terms](https://www.collinsdictionary.com/word-lists/physics-physics-terms#physics-physics-terms__1)
Quick word challenge
Quiz Review
Question: 1
\-
Score: 0 / 5
Which *physics term* am I?
either of two theories developed by Albert Einstein, the **special theory of relativity**, which requires that the laws of physics shall be the same as seen by any two different observers in uniform relative motion, and the **general theory of relativity** which considers observers with relative acceleration and leads to a theory of gravitation
[kinetic energy]() [red shift]() [relativity]()
Which *physics term* am I?
the part of the electromagnetic spectrum with a longer wavelength than light but a shorter wavelength than radio waves; radiation with wavelength between 0.8 micrometres and 1 millimetre
[infrared]() [kinetic energy]() [red shift]()
Which *physics term* am I?
a dynamic influence that changes a body from a state of rest to one of motion or changes its rate of motion. The magnitude of the force is equal to the product of the mass of the body and its acceleration
[force]() [kinetic energy]() [mass]()
Which *physics term* am I?
the derived SI unit of electric capacitance; the capacitance of a capacitor between the plates of which a potential of 1 volt is created by a charge of 1 coulomb
[farad]() [kinetic energy]() [volt]()
Which *physics term* am I?
the time taken for half of the atoms in a radioactive material to undergo decay
[half-life]() [kinetic energy]() [red shift]()
Your score:
Check
See the answer
Next
Next quiz
Review
You may also like
[ English Quiz Confusables](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZWx0L2NvbmZ1c2FibGVz "English Quiz")
[ Language Lover's Blog](https://blog.collinsdictionary.com/ "Language Lover's")
[ Word List 'terms used in chemistry'](https://www.collinsdictionary.com/word-lists/chemistry-terms-used-in-chemistry#chemistry-terms-used-in-chemistry__1 "Word List")
[ Translate your text](https://www.collinsdictionary.com/translator "Translate")
[ Pronunciation Playlists](https://www.collinsdictionary.com/video/video-pronunciations "Pronunciation")
[ Word of the day: 'cheugy'](https://www.collinsdictionary.com/dictionary/english/cheugy "Word of the day: cheugy")
[ English Grammar](https://grammar.collinsdictionary.com/easy-learning "English")
[ Collins Apps](https://www.collinsdictionary.com/resources#get_apps "Collins")
## Browse nearby entries Brownian motion
- [brownfield](https://www.collinsdictionary.com/dictionary/english/brownfield "Definition of brownfield, nearby word of Brownian motion")
- [brownfield development](https://www.collinsdictionary.com/dictionary/english/brownfield-development "Definition of brownfield development, nearby word of Brownian motion")
- [brownfield site](https://www.collinsdictionary.com/dictionary/english/brownfield-site "Definition of brownfield site, nearby word of Brownian motion")
- Brownian motion
- [Brownian movement](https://www.collinsdictionary.com/dictionary/english/brownian-movement "Definition of Brownian movement, nearby word of Brownian motion")
- [brownie](https://www.collinsdictionary.com/dictionary/english/brownie "Definition of brownie, nearby word of Brownian motion")
- [Brownie Guide](https://www.collinsdictionary.com/dictionary/english/brownie-guide "Definition of Brownie Guide, nearby word of Brownian motion")
- [All ENGLISH words that begin with 'B'](https://www.collinsdictionary.com/browse/english/words-starting-with-b "All ENGLISH words that begin with 'B'")
## Related terms of Brownian motion
- [Brownian motion](https://www.collinsdictionary.com/dictionary/english/brownian-movement "Definition of Brownian motion, related term of Brownian motion")
[ Wordle Helper](https://www.collinsdictionary.com/games/wordle-helper "Wordle Helper")
[ Scrabble Tools](https://scrabble.collinsdictionary.com/ "Scrabble Tools")
Quick word challenge
Quiz Review
Question: 1
\-
Score: 0 / 5
HOUSEHOLD
Drag the correct answer into the box.

dustpan
sideboard
vacuum cleaner
armchair
HOUSEHOLD
What is this an image of?

[ironing board]() [sideboard]() [clothes horse]() [bucket]()
HOUSEHOLD
What is this an image of?

[desk]() [bin]() [radiator]() [bookcase]()
HOUSEHOLD
Drag the correct answer into the box.

double bed
washing machine
dishwasher
table
HOUSEHOLD
Drag the correct answer into the box.

cot
mop
dustpan
ironing board
Your score:
Check
See the answer
Next
Next quiz
Review
[What’s the difference between ‘which’ and ‘witch’? Which or witch? They sound the same but mean different things. Learn how to use each correctly with simple explanations and examples. March 3, 2026 Read more](https://blog.collinsdictionary.com/language-lovers/whats-the-difference-between-which-and-witch/ "What’s the difference between ‘which’ and ‘witch’?")
[What’s the difference between ‘aural’ and ‘oral’? Aural relates to hearing; oral relates to speaking. They sound alike but have completely different meanings and uses. Read more](https://blog.collinsdictionary.com/language-learners/whats-the-difference-between-aural-and-oral/ "What’s the difference between ‘aural’ and ‘oral’?")
[What’s the difference between ‘aloud’ and ‘allowed’? Confused by 'aloud' vs 'allowed'? One means speaking so others hear, the other is all about permission. Clear up the mix-up in seconds! Read more](https://blog.collinsdictionary.com/wp-admin/post.php?post=15575&action=edit "What’s the difference between ‘aloud’ and ‘allowed’?")
[What’s the difference between ‘passed’ and ‘past’? Confused by "passed" vs. "past"? Learn the key differences and how to use each correctly in this quick guide! Read more](https://blog.collinsdictionary.com/language-learners/whats-the-difference-between-passed-and-past/ "What’s the difference between ‘passed’ and ‘past’?")
[Collins English Dictionary Apps Download our English Dictionary apps - available for both iOS and Android. Read more](https://www.collinsdictionary.com/resources#get_apps "Collins English Dictionary Apps")
[Collins Dictionaries for Schools Our new online dictionaries for schools provide a safe and appropriate environment for children. And best of all it's ad free, so sign up now and start using at home or in the classroom. Read more](https://schools.collinsdictionary.com/ "Collins Dictionaries for Schools")
[Word lists We have almost 200 lists of words from topics as varied as types of butterflies, jackets, currencies, vegetables and knots! Amaze your friends with your new-found knowledge! Read more](https://www.collinsdictionary.com/word-lists "Word lists")
[  ](https://www.collinsdictionary.com/assistant)
Create an account and sign in to access this FREE content
[Register now](https://www.collinsdictionary.com/register) or [log in]() to access
Elevate your vocabulary Sign up to our newsletter to receive our latest news, exclusive content and offers.
[Sign up now](https://signup.collins.co.uk/join/6lj/signup-collins-dictionary)
Choose your language
[Italiano](https://www.collinsdictionary.com/it/dizionario/inglese/brownian-motion)
[American](https://www.collinsdictionary.com/us/dictionary/english/brownian-motion)
[Português](https://www.collinsdictionary.com/pt/dictionary/english/brownian-motion)
[한국어](https://www.collinsdictionary.com/ko/dictionary/english/brownian-motion)
[简体中文](https://www.collinsdictionary.com/zh/dictionary/english/brownian-motion)
[Deutsch](https://www.collinsdictionary.com/de/worterbuch/englisch/brownian-motion)
[Español](https://www.collinsdictionary.com/es/diccionario/ingles/brownian-motion)
[हिंदी](https://www.collinsdictionary.com/hi/dictionary/english/brownian-motion)
[日本語](https://www.collinsdictionary.com/jp/dictionary/english/brownian-motion)
Collins Dictionaries
[Browse all official Collins dictionaries](https://www.collinsdictionary.com/browse/ "Browse all official Collins dictionaries")
About Collins
[About Us](https://www.collinsdictionary.com/about/)
[Contact Us](https://blog.collinsdictionary.com/contact-us/)
[FAQs](https://blog.collinsdictionary.com/faqs/)
[Consent Management]()
[Terms & Conditions](https://www.collinsdictionary.com/terms-and-conditions)
[Privacy Policy](https://www.harpercollins.co.uk/corporate/privacy-policy/)
[California Privacy Rights](https://www.harpercollins.co.uk/corporate/california-privacy-rights/)
[Do Not Sell My Personal Information](https://www.harpercollins.co.uk/corporate/do-not-sell-my-personal-information/)
[Security](https://www.collinsdictionary.com/security)
Useful Links
[Advertise with us](https://www.collinsdictionary.com/advertising)
[B2B Partnerships](https://collins.co.uk/pages/licensing-and-rights)
[Collins COBUILD](https://collins.co.uk/category/English+Language+Teaching/COBUILD+Reference/)
[Collins ELT](https://collins.co.uk/category/English+Language+Teaching/)
[Dictionary API](https://www.collinsdictionary.com/collins-api)
[HarperCollins Publishers](https://www.harpercollins.co.uk/)
[Word Banks](https://wordbanks.harpercollins.co.uk/)
© Collins 2026
×
Register for free on collinsdictionary.com
Unlock this page by registering for free on collinsdictionary.com
- Access the entire site, including our language quizzes.
- Customize your language settings. (Unregistered users can only access the International English interface for some pages.)
- Submit new words and phrases to the dictionary.
- Benefit from an increased character limit in our Translator tool.
- Receive our weekly newsletter with the latest news, exclusive content, and offers.
- Be the first to enjoy new tools and features.
- It is easy and **completely free**\!
REGISTER
Maybe later
Already registered? [Log in here]()
Collins
[TRANSLATOR](https://www.collinsdictionary.com/translator "Translator")
[LANGUAGE](https://www.collinsdictionary.com/dictionary/english "Language")
[English](https://www.collinsdictionary.com/dictionary/english "English")
[English Dictionary](https://www.collinsdictionary.com/dictionary/english "English Dictionary")
[Thesaurus](https://www.collinsdictionary.com/dictionary/english-thesaurus "Thesaurus")
[Word Lists](https://www.collinsdictionary.com/word-lists "Word Lists")
[Grammar](https://www.collinsdictionary.com/dictionary/english/brownian-motion "Grammar")
[English Easy Learning Grammar](https://grammar.collinsdictionary.com/easy-learning "English Easy Learning Grammar")
[Grammar Patterns](https://grammar.collinsdictionary.com/grammar-pattern "Grammar Patterns")
[English Usage](https://grammar.collinsdictionary.com/english-usage "English Usage")
[Teaching Resources](https://grammar.collinsdictionary.com/grammar-pattern/teaching-resources "Teaching Resources")
[Video Guides](https://grammar.collinsdictionary.com/grammar-pattern/video-guides "Video Guides")
[Conjugations](https://www.collinsdictionary.com/conjugation/english "Conjugations")
[Sentences](https://www.collinsdictionary.com/sentences/english "Sentences")
[Video](https://www.collinsdictionary.com/dictionary/english/brownian-motion "Video")
[Learn English](https://www.collinsdictionary.com/video/learn-english-through-video "Learn English")
[Video pronunciations](https://www.collinsdictionary.com/video/video-pronunciations "Video pronunciations")
[Build your vocabulary](https://www.collinsdictionary.com/video/build-your-english-vocabulary "Build your vocabulary")
[Quiz](https://www.collinsdictionary.com/dictionary/english/brownian-motion "Quiz")
[English grammar](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZWx0 "English grammar")
[English collocations](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZW4vY29sbG9jYXRpb25z "English collocations")
[English confusables](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZW4vY29uZnVzYWJsZXM= "English confusables")
[English idioms](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZW4vaWRpb21z "English idioms")
[English images](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZW4vaW1hZ2U= "English images")
[English usage](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZW4vdXNhZ2U= "English usage")
[English synonyms](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZW4vc3lub255bXM= "English synonyms")
[Thematic word lists](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovd29yZGxpc3Q= "Thematic word lists")
[French](https://www.collinsdictionary.com/dictionary/english-french "French")
[English to French](https://www.collinsdictionary.com/dictionary/english-french "English to French")
[French to English](https://www.collinsdictionary.com/dictionary/french-english "French to English")
[Grammar](https://grammar.collinsdictionary.com/french-easy-learning "Grammar")
[Pronunciation Guide](https://grammar.collinsdictionary.com/pronunciation-guide-fr "Pronunciation Guide")
[Conjugations](https://www.collinsdictionary.com/conjugation/french "Conjugations")
[Sentences](https://www.collinsdictionary.com/sentences/french "Sentences")
[Video](https://www.collinsdictionary.com/dictionary/english/brownian-motion "Video")
[Build your vocabulary](https://www.collinsdictionary.com/video/build-your-french-vocabulary "Build your vocabulary")
[Quiz](https://www.collinsdictionary.com/dictionary/english/brownian-motion "Quiz")
[French confusables](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZnIvY29uZnVzYWJsZXM= "French confusables")
[French images](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZnIvaW1hZ2U= "French images")
[German](https://www.collinsdictionary.com/dictionary/english-german "German")
[English to German](https://www.collinsdictionary.com/dictionary/english-german "English to German")
[German to English](https://www.collinsdictionary.com/dictionary/german-english "German to English")
[Grammar](https://grammar.collinsdictionary.com/german-easy-learning "Grammar")
[Conjugations](https://www.collinsdictionary.com/conjugation/german "Conjugations")
[Sentences](https://www.collinsdictionary.com/sentences/german "Sentences")
[Video](https://www.collinsdictionary.com/dictionary/english/brownian-motion "Video")
[Build your vocabulary](https://www.collinsdictionary.com/video/build-your-german-vocabulary "Build your vocabulary")
[Quiz](https://www.collinsdictionary.com/dictionary/english/brownian-motion "Quiz")
[German confusables](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZGUvY29uZnVzYWJsZXM= "German confusables")
[German images](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZGUvaW1hZ2U= "German images")
[Italian](https://www.collinsdictionary.com/dictionary/english-italian "Italian")
[English to Italian](https://www.collinsdictionary.com/dictionary/english-italian "English to Italian")
[Italian to English](https://www.collinsdictionary.com/dictionary/italian-english "Italian to English")
[Grammar](https://grammar.collinsdictionary.com/italian-easy-learning "Grammar")
[Conjugations](https://www.collinsdictionary.com/conjugation/italian "Conjugations")
[Sentences](https://www.collinsdictionary.com/sentences/italian "Sentences")
[Video](https://www.collinsdictionary.com/dictionary/english/brownian-motion "Video")
[Build your vocabulary](https://www.collinsdictionary.com/video/build-your-italian-vocabulary "Build your vocabulary")
[Quiz](https://www.collinsdictionary.com/dictionary/english/brownian-motion "Quiz")
[Italian confusables](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovaXQvY29uZnVzYWJsZXM= "Italian confusables")
[Italian images](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovaXQvaW1hZ2U= "Italian images")
[Spanish](https://www.collinsdictionary.com/dictionary/english-spanish "Spanish")
[English to Spanish](https://www.collinsdictionary.com/dictionary/english-spanish "English to Spanish")
[Spanish to English](https://www.collinsdictionary.com/dictionary/spanish-english "Spanish to English")
[Grammar](https://grammar.collinsdictionary.com/spanish-easy-learning "Grammar")
[Pronunciation Guide](https://grammar.collinsdictionary.com/pronunciation-guide "Pronunciation Guide")
[Conjugations](https://www.collinsdictionary.com/conjugation/spanish "Conjugations")
[Sentences](https://www.collinsdictionary.com/sentences/spanish "Sentences")
[Video](https://www.collinsdictionary.com/dictionary/english/brownian-motion "Video")
[Build your vocabulary](https://www.collinsdictionary.com/video/build-your-spanish-vocabulary "Build your vocabulary")
[Quiz](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZXM= "Quiz")
[Portuguese](https://www.collinsdictionary.com/dictionary/english-portuguese "Portuguese")
[English to Portuguese](https://www.collinsdictionary.com/dictionary/english-portuguese "English to Portuguese")
[Portuguese to English](https://www.collinsdictionary.com/dictionary/portuguese-english "Portuguese to English")
[Grammar](https://grammar.collinsdictionary.com/portuguese-easy-learning "Grammar")
[Conjugations](https://www.collinsdictionary.com/conjugation/portuguese "Conjugations")
[Video](https://www.collinsdictionary.com/dictionary/english/brownian-motion "Video")
[Build your vocabulary](https://www.collinsdictionary.com/video/build-your-english-vocabulary "Build your vocabulary")
[Hindi](https://www.collinsdictionary.com/dictionary/english-hindi "Hindi")
[English to Hindi](https://www.collinsdictionary.com/dictionary/english-hindi "English to Hindi")
[Hindi to English](https://www.collinsdictionary.com/dictionary/hindi-english "Hindi to English")
[Video](https://www.collinsdictionary.com/dictionary/english/brownian-motion "Video")
[Build your vocabulary](https://www.collinsdictionary.com/video/build-your-english-vocabulary "Build your vocabulary")
[Chinese](https://www.collinsdictionary.com/dictionary/english-chinese "Chinese")
[English to Simplified](https://www.collinsdictionary.com/dictionary/english-chinese "English to Simplified")
[Simplified to English](https://www.collinsdictionary.com/dictionary/chinese-english "Simplified to English")
[English to Traditional](https://www.collinsdictionary.com/dictionary/english-chinese_traditional "English to Traditional")
[Traditional to English](https://www.collinsdictionary.com/dictionary/chinese_traditional-english "Traditional to English")
[Quiz](https://www.collinsdictionary.com/dictionary/english/brownian-motion "Quiz")
[Mandarin Chinese confusables](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovemgvY29uZnVzYWJsZXM= "Mandarin Chinese confusables")
[Mandarin Chinese images](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovemgvaW1hZ2U= "Mandarin Chinese images")
[Traditional Chinese confusables](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovemgtdC9jb25mdXNhYmxlcw== "Traditional Chinese confusables")
[Traditional Chinese images](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovemgtdC9pbWFnZQ== "Traditional Chinese images")
[Video](https://www.collinsdictionary.com/dictionary/english/brownian-motion "Video")
[Build your vocabulary](https://www.collinsdictionary.com/video/build-your-english-vocabulary "Build your vocabulary")
[Korean](https://www.collinsdictionary.com/dictionary/english-korean "Korean")
[English to Korean](https://www.collinsdictionary.com/dictionary/english-korean "English to Korean")
[Korean to English](https://www.collinsdictionary.com/dictionary/korean-english "Korean to English")
[Video](https://www.collinsdictionary.com/dictionary/english/brownian-motion "Video")
[Build your vocabulary](https://www.collinsdictionary.com/video/build-your-english-vocabulary "Build your vocabulary")
[Japanese](https://www.collinsdictionary.com/dictionary/english-japanese "Japanese")
[English to Japanese](https://www.collinsdictionary.com/dictionary/english-japanese "English to Japanese")
[Japanese to English](https://www.collinsdictionary.com/dictionary/japanese-english "Japanese to English")
[Video](https://www.collinsdictionary.com/dictionary/english/brownian-motion "Video")
[Build your vocabulary](https://www.collinsdictionary.com/video/build-your-english-vocabulary "Build your vocabulary")
[GAMES](https://www.collinsdictionary.com/quiz/ "Games")
[Quiz](https://www.collinsdictionary.com/dictionary/english/brownian-motion "Quiz")
[English grammar](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZWx0 "English grammar")
[English collocations](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZW4vY29sbG9jYXRpb25z "English collocations")
[English confusables](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZW4vY29uZnVzYWJsZXM= "English confusables")
[English idioms](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZW4vaWRpb21z "English idioms")
[English images](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZW4vaW1hZ2U= "English images")
[English usage](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZW4vdXNhZ2U= "English usage")
[English synonyms](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZW4vc3lub255bXM= "English synonyms")
[Thematic word lists](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovd29yZGxpc3Q= "Thematic word lists")
[French grammar](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZnI= "French grammar")
[French images](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZnIvaW1hZ2U= "French images")
[German grammar](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZGU= "German grammar")
[German images](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZGUvaW1hZ2U= "German images")
[Italian grammar](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovaXQ= "Italian grammar")
[Italian images](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovaXQvaW1hZ2U= "Italian images")
[Mandarin Chinese characters](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovemg= "Mandarin Chinese characters")
[Traditional Chinese](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovemgtdA== "Traditional Chinese")
[Spanish grammar](https://www.collinsdictionary.com/login?mode=popup§ion=quiz&returnTo=aHR0cHM6Ly93d3cuY29sbGluc2RpY3Rpb25hcnkuY29tL3F1aXovZXM= "Spanish grammar")
[Scrabble](https://scrabble.collinsdictionary.com/ "Scrabble")
[Wordle Helper](https://www.collinsdictionary.com/games/wordle-helper "Wordle Helper")
[Collins Conundrum](https://www.collinsdictionary.com/games/conundrum "Collins Conundrum")
[SCHOOLS](https://schools.collinsdictionary.com/ "Schools")
[Home School](https://schools.collinsdictionary.com/ "Home School")
[Primary School](https://schools.collinsdictionary.com/dictionary/primary "Primary School")
[Secondary School](https://schools.collinsdictionary.com/dictionary/secondary "Secondary School")
[BLOG](https://blog.collinsdictionary.com/ "Blog")
[RESOURCES](https://www.collinsdictionary.com/resources "Resources")
[Resources](https://www.collinsdictionary.com/resources "Resources")
[Collins Word of the Day](https://www.collinsdictionary.com/word-of-the-day "Collins Word of the Day")
[Paul Noble Method](https://www.collinsdictionary.com/paul-noble-method "Paul Noble Method")
[Word of the Year](https://www.collinsdictionary.com/woty "Word of the Year")
[Collins API](https://www.collinsdictionary.com/collins-api "Collins API") |
| Readable Markdown | ## Brownian motion in British English
(ˈbraʊnɪən ˈməʊʃən [](https://blog.collinsdictionary.com/ipa-pronunciation-guide-ced/ "IPA Pronunciation Guide") )
noun
Collins English Dictionary. Copyright © HarperCollins Publishers
## Brownian movement in British English
(ˈbraʊnɪən [](https://blog.collinsdictionary.com/ipa-pronunciation-guide-ced/ "IPA Pronunciation Guide") ) or Brownian motion
noun
Collins English Dictionary. Copyright © HarperCollins Publishers
Word origin
C19: named after Robert Brown
## Examples of 'Brownian motion' in a sentence Brownian motion
These examples have been automatically selected and may contain sensitive content that does not reflect the opinions or policies of Collins, or its parent company HarperCollins.
I moved out of the [doorway](https://www.collinsdictionary.com/dictionary/english/doorway "Definition of doorway") and [stood](https://www.collinsdictionary.com/dictionary/english/stand "Definition of stood") in the room with my [thoughts](https://www.collinsdictionary.com/dictionary/english/thought "Definition of thoughts") in Brownian [motion](https://www.collinsdictionary.com/dictionary/english/motion "Definition of motion"). Robert Wilson INSTRUMENTS OF DARKNESS (2002)
## Word lists with Brownian motion
[terms used in chemistry](https://www.collinsdictionary.com/word-lists/chemistry-terms-used-in-chemistry#chemistry-terms-used-in-chemistry__1) [Physics terms](https://www.collinsdictionary.com/word-lists/physics-physics-terms#physics-physics-terms__1)
Quick word challenge
Quiz Review
Question: 1
\-
Score: 0 / 5
Which *physics term* am I?
either of two theories developed by Albert Einstein, the **special theory of relativity**, which requires that the laws of physics shall be the same as seen by any two different observers in uniform relative motion, and the **general theory of relativity** which considers observers with relative acceleration and leads to a theory of gravitation
Which *physics term* am I?
the part of the electromagnetic spectrum with a longer wavelength than light but a shorter wavelength than radio waves; radiation with wavelength between 0.8 micrometres and 1 millimetre
Which *physics term* am I?
a dynamic influence that changes a body from a state of rest to one of motion or changes its rate of motion. The magnitude of the force is equal to the product of the mass of the body and its acceleration
Which *physics term* am I?
the derived SI unit of electric capacitance; the capacitance of a capacitor between the plates of which a potential of 1 volt is created by a charge of 1 coulomb
Which *physics term* am I?
the time taken for half of the atoms in a radioactive material to undergo decay
Your score:
You may also like
Quick word challenge
Quiz Review
Question: 1
\-
Score: 0 / 5
HOUSEHOLD
Drag the correct answer into the box.

dustpan
sideboard
vacuum cleaner
armchair
HOUSEHOLD
What is this an image of?

HOUSEHOLD
What is this an image of?

HOUSEHOLD
Drag the correct answer into the box.

double bed
washing machine
dishwasher
table
HOUSEHOLD
Drag the correct answer into the box.

cot
mop
dustpan
ironing board
Your score: |
| Shard | 6 (laksa) |
| Root Hash | 3710495105961603006 |
| Unparsed URL | com,collinsdictionary!www,/dictionary/english/brownian-motion s443 |