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
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
Ground-level ozone also is a greenhouse gas that contributes to climate change, which causes hotter summers, which in turn increases ozone pollution.
—
Noelle Phillips, Denver Post, 3 Apr. 2025
Such glaciation could have been driven by dramatic reductions in the levels of atmospheric ozone due to a near-Earth core collapse supernovae.
—Bruce Dorminey, Forbes, 14 Mar. 2025
Wildfire smoke can also increase ground-level ozone, which is harmful to both human health and crop growth.
—Tribune Content Agency, The Mercury News, 15 Jan. 2025
The waiver can be used to rein in toxic, smog-causing pollutants like soot, nitrogen dioxide and ozone that lead to asthma and lung disease.
—Coral Davenport, New York Times, 14 Dec. 2024
See All Example Sentences for ozone
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Noelle Phillips, Denver Post, 3 Apr. 2025
Such glaciation could have been driven by dramatic reductions in the levels of atmospheric ozone due to a near-Earth core collapse supernovae.
—Bruce Dorminey, Forbes, 14 Mar. 2025
Wildfire smoke can also increase ground-level ozone, which is harmful to both human health and crop growth.
—Tribune Content Agency, The Mercury News, 15 Jan. 2025
The waiver can be used to rein in toxic, smog-causing pollutants like soot, nitrogen dioxide and ozone that lead to asthma and lung disease.
—Coral Davenport, New York Times, 14 Dec. 2024
See All Example Sentences for ozone
Cite this Entry
“Ozone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ozone. Accessed 20 Apr. 2025.
Copy CitationKids Definition
ozone
noun1
: a form of oxygen that is a bluish irritating sharp-smelling gas containing three atoms per molecule, and that is used especially in disinfecting, deodorizing, and bleaching
2
: pure and refreshing air
Medical Definition
ozone
noun
: 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
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