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
Exposure to ozone pollution can cause asthma attacks and chest pain in the short term.
—
Jen Christensen, CNN Money, 22 Apr. 2026
In this case, nitrogen oxides and what are called volatile organic chemicals react with sunlight to create ground-level ozone, the principal component of smog.
—Andrea Thompson, Scientific American, 22 Apr. 2026
Cutting-edge tech abounds, including machines from the VR training company Icaros that give you a crazy core workout, devices for intravenous ozone therapy, a bed for advanced cell regeneration therapy to repair damaged tissue, and a hell of a lot more.
—Condé Nast, Condé Nast Traveler, 22 Apr. 2026
The report says Los Angeles has ranked worst for ozone in 26 of the 27 years the ALA has issued the study.
—Meg Tanaka, Los Angeles Times, 22 Apr. 2026
See All Example Sentences for ozone
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Jen Christensen, CNN Money, 22 Apr. 2026
In this case, nitrogen oxides and what are called volatile organic chemicals react with sunlight to create ground-level ozone, the principal component of smog.
—Andrea Thompson, Scientific American, 22 Apr. 2026
Cutting-edge tech abounds, including machines from the VR training company Icaros that give you a crazy core workout, devices for intravenous ozone therapy, a bed for advanced cell regeneration therapy to repair damaged tissue, and a hell of a lot more.
—Condé Nast, Condé Nast Traveler, 22 Apr. 2026
The report says Los Angeles has ranked worst for ozone in 26 of the 27 years the ALA has issued the study.
—Meg Tanaka, Los Angeles Times, 22 Apr. 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 25 Apr. 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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