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
The agency notes that extreme heat contributes to more than 700 deaths annually across the U.S.
Rising temperatures can also worsen ground-level ozone pollution, potentially compounding existing health risks.
—
Joe Edwards, MSNBC Newsweek, 15 Aug. 2025
And the city’s ozone levels regularly exceed national minimum air quality standards.
—Andrew R. Chow, Time, 13 Aug. 2025
Warm, sunny weather optimizes the conditions for this sort of reaction, meaning unhealthy ozone levels are often seen in the summer.
—Jack Albright, jsonline.com, 6 Aug. 2025
Recent studies have highlighted how these pollutants, including tropospheric ozone, methane and black carbon are driving a large amount of global warming, despite being relatively overlooked.
—Jamie Hailstone, Forbes.com, 28 July 2025
See All Example Sentences for ozone
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Joe Edwards, MSNBC Newsweek, 15 Aug. 2025
And the city’s ozone levels regularly exceed national minimum air quality standards.
—Andrew R. Chow, Time, 13 Aug. 2025
Warm, sunny weather optimizes the conditions for this sort of reaction, meaning unhealthy ozone levels are often seen in the summer.
—Jack Albright, jsonline.com, 6 Aug. 2025
Recent studies have highlighted how these pollutants, including tropospheric ozone, methane and black carbon are driving a large amount of global warming, despite being relatively overlooked.
—Jamie Hailstone, Forbes.com, 28 July 2025
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 Aug. 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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