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 brand works closely with its laundries to set up and test the process, which leverages ozone, lasers and e-Flow to save on water, chemicals and energy.
—
Sarah Jones, Sourcing Journal, 21 Nov. 2025
In many therapy concepts, it is complemented by additional interventions such as hyperthermia, ozone or infusion therapies.
—CBS News, 19 Nov. 2025
In the 1970s, CFCs were banned under the Montreal Protocol for depleting the ozone layer; they were replaced with HFCs, which don't harm ozone but have strong global warming effects that last hundreds of years.
—Michaila Byrne, MSNBC Newsweek, 13 Nov. 2025
Meanwhile, warmer conditions favor the formation of ground-level ozone, a heart and lung irritant.
—Vijay Limaye, The Conversation, 12 Nov. 2025
See All Example Sentences for ozone
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Sarah Jones, Sourcing Journal, 21 Nov. 2025
In many therapy concepts, it is complemented by additional interventions such as hyperthermia, ozone or infusion therapies.
—CBS News, 19 Nov. 2025
In the 1970s, CFCs were banned under the Montreal Protocol for depleting the ozone layer; they were replaced with HFCs, which don't harm ozone but have strong global warming effects that last hundreds of years.
—Michaila Byrne, MSNBC Newsweek, 13 Nov. 2025
Meanwhile, warmer conditions favor the formation of ground-level ozone, a heart and lung irritant.
—Vijay Limaye, The Conversation, 12 Nov. 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 28 Nov. 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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