1 particle | Definition of particle

particle

noun
par·​ti·​cle | \ ˈpär-ti-kəl How to pronounce particle (audio) \

Definition of particle

1a : a minute quantity or fragment
b : a relatively small or the smallest discrete portion or amount of something
2 archaic : a clause or article of a composition or document
3 : any of the basic units of matter and energy (such as a molecule, atom, proton, electron, or photon)
4 : a unit of speech expressing some general aspect of meaning or some connective or limiting relation and including the articles, most prepositions and conjunctions, and some interjections and adverbs the particle up has a perfective meaning in phrases such as beat up and cut up
5 : a small eucharistic wafer distributed to a Roman Catholic layman at Communion

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Examples of particle in a Sentence

There is not a particle of evidence to support their claim. There is not a particle of truth in what he said. The phrasal verb “look up” consists of the verb “look” and the adverbial particle “up.”
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Recent Examples on the Web

The best samples had many kinds of living organisms in them, with masses of dead mould, bits of cellulose, various colored particles, shreds of hair, bristles, etc. Rick Barrett, Milwaukee Journal Sentinel, "Margarine smugglers, a deadly milk war and more flavor Wisconsin's dairy history," 28 Aug. 2019 Some particles, such as dust, dirt, soot or smoke, are large or dark enough to be seen with the naked eye. Doyle Rice, USA TODAY, "Killer smog: Even small amounts of air pollution linked to risk of early death, study finds," 22 Aug. 2019 Here are other ways to protect your dog from blue-green algae: Avoid water that appears to be cloudy, contains floating particles, or has green algae near the surface. Selena Barrientos, House Beautiful, "Blue-Green Algae in Lakes Is Killing Dogs—Here’s What You Should Know," 19 Aug. 2019 The Italian scientists theorized the particles, which act as their own antiparticles, in 1937. David Grossman, Popular Mechanics, "Looks Like We Have a New State of Matter," 16 Aug. 2019 The issue is that sand dredged from the offshore ocean is a different color than the white, coral particles that are natural to the beach. John Christopher Fine, sun-sentinel.com, "Rejoice as turtles make their return | Opinion," 15 Aug. 2019 Plastic particles at sea act as magnets for toxic chemicals and organic pollutants. Rowan Jacobsen, Outside Online, "An Ocean Plastics Field Trip for Corporate Executives," 8 Aug. 2019 While quantum mechanics describes the smallest particles in our universe—a realm where gravity can usually be ignored—general relativity deals with massive objects that have immense gravitational fields. Emily Toomey, Smithsonian, "A Star Orbiting in the Extreme Gravity of a Black Hole Validates General Relativity," 25 July 2019 Lewis said smoke is made of small particles, some smaller than 2.5 microns in diameter. oregonlive.com, "What are the long-term health effects from wildfire smoke? Oregon doctors say it’s something they’re still learning about.," 22 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'particle.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of particle

14th century, in the meaning defined at sense 1a

History and Etymology for particle

Middle English, from Latin particula, from diminutive of part-, pars

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More Definitions for particle

particle

noun

English Language Learners Definition of particle

: a very small piece of something
: a very small amount of something
physics : any one of the very small parts of matter (such as a molecule, atom, or electron)

particle

noun
par·​ti·​cle | \ ˈpär-ti-kəl How to pronounce particle (audio) \

Kids Definition of particle

: a very small bit or amount of something a particle of sand a particle of sense

particle

noun
par·​ti·​cle | \ ˈpärt-i-kəl How to pronounce particle (audio) \

Medical Definition of particle

1 : one of the minute subdivisions of matter (as an atom or molecule) also : elementary particle
2