ozone
noun
ˈō-ˌzōn 
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
ozonic
ō-ˈzō-nik -ˈzä-
adjective -ˈzä- 
Example Sentences
Scientists are concerned about ozone depletion. A light breeze filled the rooms of our seaside cottage with ozone.
Recent Examples on the Web In the presence of the sun’s rays, nitrogen molecules set of a chain of reactions that produce ozone and destroy free-floating atmospheric methane. 
Wired, 28 July 2022 Both the rising temperature and the change in the jet streams will reduce ozone in global latitudes north of Houston, Texas, by as much as 4 percent. Caroline Delbert, Popular Mechanics, 28 June 2022 Knozone Action Days are more frequent during warmer months, when pollutants react with sunlight and heat to create ozone. Madison Smalstig, The Indianapolis Star, 20 June 2022 People at greatest risk of harm from breathing air containing ozone include people with asthma, according to the EPA. Quinlan Bentley, The Enquirer, 5 June 2022 The vote is part of the county’s Regional Decarbonization Framework that looks to eliminate carbon dioxide emissions and reduce pollution and ground-level ozone. Rob Nikolewski, San Diego Union-Tribune, 20 Oct. 2021 By the end of the century, atmospheric ozone declines by about 72%. Chelsea Harvey, Scientific American, 20 Aug. 2021 As temps climb and ozone levels rise, Utah officials say, parking the car and taking UTA will help clear the air. Blake Apgar, The Salt Lake Tribune, 31 Aug. 2022 Rising temperatures elevate ozone levels in the air, which can aggravate asthma symptoms and irritate airways. Erik Ortiz, NBC News, 20 Aug. 2022 See More
Wired, 28 July 2022 Both the rising temperature and the change in the jet streams will reduce ozone in global latitudes north of Houston, Texas, by as much as 4 percent. Caroline Delbert, Popular Mechanics, 28 June 2022 Knozone Action Days are more frequent during warmer months, when pollutants react with sunlight and heat to create ozone. Madison Smalstig, The Indianapolis Star, 20 June 2022 People at greatest risk of harm from breathing air containing ozone include people with asthma, according to the EPA. Quinlan Bentley, The Enquirer, 5 June 2022 The vote is part of the county’s Regional Decarbonization Framework that looks to eliminate carbon dioxide emissions and reduce pollution and ground-level ozone. Rob Nikolewski, San Diego Union-Tribune, 20 Oct. 2021 By the end of the century, atmospheric ozone declines by about 72%. Chelsea Harvey, Scientific American, 20 Aug. 2021 As temps climb and ozone levels rise, Utah officials say, parking the car and taking UTA will help clear the air. Blake Apgar, The Salt Lake Tribune, 31 Aug. 2022 Rising temperatures elevate ozone levels in the air, which can aggravate asthma symptoms and irritate airways. Erik Ortiz, NBC News, 20 Aug. 2022 See More Word History
Etymology
German Ozon, from Greek ozōn, present participle of ozein to smell — more at odor
First Known Use
1841, in the meaning defined at sense 1
Phrases Containing ozone
Kids Definition
ozone
noun
ˈō-ˌzōn
: a faintly blue form of oxygen that is present in the air in small quantities
Medical Definition
ozone
noun
ˈō-ˌzōn
: 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