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
Methane is a particularly destructive greenhouse gas and ozone pollutant.
—
Elizabeth MacBride, CNBC, 19 May 2026
At the ground level, ozone is a harmful pollutant that is the main ingredient in smog, according to the Environmental Protection Agency.
—Neal Riley, CBS News, 19 May 2026
Skip models with ionizers, which can produce ozone and make things worse.
—Ryan Brennan, Kansas City Star, 19 May 2026
Drivers in several parts of Texas are being urged to stay off the roads when possible as ozone pollution is expected to rise.
—Natassia Paloma, USA Today, 13 May 2026
See All Example Sentences for ozone
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Elizabeth MacBride, CNBC, 19 May 2026
At the ground level, ozone is a harmful pollutant that is the main ingredient in smog, according to the Environmental Protection Agency.
—Neal Riley, CBS News, 19 May 2026
Skip models with ionizers, which can produce ozone and make things worse.
—Ryan Brennan, Kansas City Star, 19 May 2026
Drivers in several parts of Texas are being urged to stay off the roads when possible as ozone pollution is expected to rise.
—Natassia Paloma, USA Today, 13 May 2026
See All Example Sentences for ozone
Cite this Entry
“Ozone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ozone. Accessed 22 May. 2026.
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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