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 indoor pool is purified with ozone.
—
Lydia Bell, Condé Nast Traveler, 22 Jan. 2026
But research later determined that the neurotoxic gas also can cause serious health issues in humans and contributed to the depletion of the ozone, ultimately leading to its ban under the Montreal Protocol, an international treaty, in 2005.
—Tony Briscoe, Los Angeles Times, 22 Jan. 2026
Both machines help curb two of the most widespread, deadly air pollutants – fine particulate matter and ozone.
—Ashley Miznazi, Miami Herald, 21 Jan. 2026
On Monday, The New York Times reported that the EPA plans to stop considering health benefits when setting air pollution rules, specifically from curbing pollutants from fine particulate matter and ozone.
—Maya Wilkins, Chicago Tribune, 17 Jan. 2026
See All Example Sentences for ozone
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Lydia Bell, Condé Nast Traveler, 22 Jan. 2026
But research later determined that the neurotoxic gas also can cause serious health issues in humans and contributed to the depletion of the ozone, ultimately leading to its ban under the Montreal Protocol, an international treaty, in 2005.
—Tony Briscoe, Los Angeles Times, 22 Jan. 2026
Both machines help curb two of the most widespread, deadly air pollutants – fine particulate matter and ozone.
—Ashley Miznazi, Miami Herald, 21 Jan. 2026
On Monday, The New York Times reported that the EPA plans to stop considering health benefits when setting air pollution rules, specifically from curbing pollutants from fine particulate matter and ozone.
—Maya Wilkins, Chicago Tribune, 17 Jan. 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 1 Feb. 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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