ozone

noun
\ ˈō-ˌzōn \

Definition of ozone 

1 : a triatomic very reactive form of oxygen that is a bluish irritating gas of pungent odor, that is a major air pollutant in the lower atmosphere but a beneficial component of the upper atmosphere, and that is used for oxidizing, bleaching, disinfecting, and deodorizing
2 : pure and refreshing air relished the ozone of morning

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Other Words from ozone

ozonic \ ō-​ˈzō-​nik , -​ˈzä-​ \ adjective

Examples of ozone in a Sentence

Scientists are concerned about ozone depletion. A light breeze filled the rooms of our seaside cottage with ozone.

Recent Examples on the Web

Usually the air purifiers with ozone will have that listed on packaging or in the marketing descriptions. Rachel Rothman, Good Housekeeping, "Do Air Purifiers Actually Work?," 17 Dec. 2018 As Tollefson notes, the Mount Pinatubo eruption also sped up depletion of the ozone layer; the team hopes that calcium carbonate will have less ozone impact. Dylan Matthews, Vox, "Geoengineering is a last-ditch option to stall global warming — and it’s getting a first test," 30 Nov. 2018 Once ozone replaces gun smoke as the scent of the battlefield, ball lightning will succeed the tank and the nuclear bomb as the ultimate war-winner. Tom Shippey, WSJ, "Science Fiction: A Novelist in Awe of Physics," 16 Aug. 2018 Father’s Day will mark the start of a stretch of particularly hot and sticky days in the region, with high temperatures in the mid 80s to low 90s through at least next Monday and periods of high ozone formation. Diane Mastrull, Philly.com, "DEP issues air-quality warning for Sunday as heat wave begins," 16 June 2018 Rising average temperatures worsen ground-level ozone, which can harm breathing. Umair Irfan, Vox, "3 big takeaways from the major new US climate report," 24 Nov. 2018 There are two main categories of air pollution: First, there's ground-level ozone, which is a product of nitrogen oxides and volatile organic compounds that have been exposed to heat and sunlight. Korin Miller, SELF, "How to Stay Safe When Your City’s Air Quality Is Dangerous," 21 Aug. 2018 A couple months ago, an atmospheric study revealed that someone had started producing an ozone-depleting pollutant that had been banned under an international agreement to protect the ozone layer. Scott K. Johnson, Ars Technica, "Sources of banned CFCs found through their advertising," 9 July 2018 There are specific pollutants, like ozone, that can form in the atmosphere from chemistry, as opposed to being directly emitted. Emily Williams, BostonGlobe.com, "BU professor granted almost $1 million to study air pollution," 9 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ozone.' 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 ozone

1841, in the meaning defined at sense 1

History and Etymology for ozone

German Ozon, from Greek ozōn, present participle of ozein to smell — more at odor

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Statistics for ozone

Last Updated

8 Jan 2019

Look-up Popularity

Time Traveler for ozone

The first known use of ozone was in 1841

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More Definitions for ozone

ozone

noun

English Language Learners Definition of ozone

: a form of oxygen that is found in a layer high in the earth's atmosphere

: fresh healthy air especially near the sea

ozone

noun
\ ˈō-ˌzōn \

Kids Definition of ozone

: a faintly blue form of oxygen that is present in the air in small quantities

ozone

noun
\ ˈō-ˌzōn \

Medical Definition of ozone 

: a triatomic very reactive form of oxygen that is a bluish irritating gas of pungent odor, that is formed naturally in the atmosphere by a photochemical reaction and is a major air pollutant in the lower atmosphere but a beneficial component of the upper atmosphere, and that is used for oxidizing, bleaching, disinfecting, and deodorizing

Other Words from ozone

ozonic \ ō-​ˈzō-​nik , -​ˈzän-​ik \ adjective

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More from Merriam-Webster on ozone

Rhyming Dictionary: Words that rhyme with ozone

Spanish Central: Translation of ozone

Nglish: Translation of ozone for Spanish Speakers

Britannica.com: Encyclopedia article about ozone

Comments on ozone

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