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
In the wild and in large numbers, all of those tiny molecules react with natural ozone molecules already in the air to form new particles and scatter blue light from the sun.
—
Lisa Cericola, Southern Living, 2 Jan. 2026
Specifically flagged by the UNEP are air pollution from launch emissions, spacecraft emissions in the stratosphere, as well as space debris re-entry and the potential to alter Earth's atmospheric chemistry and dynamics with implications for climate change and depleting stratospheric ozone.
—Leonard David, Space.com, 30 Dec. 2025
Ground level ozone forms as a result of interactions between vehicle and industrial emissions and volatile organic compounds, chemicals in the air that come from a variety of sources, including pesticides.
—Alonso Daboub, Mercury News, 22 Dec. 2025
Meanwhile, Dubai’s Royal Atlantic hotel features an in-house clinic, Aeon, offering advanced treatments ranging from exosome and stem cell therapy to ozone therapy.
—Amy Francombe, Vogue, 19 Dec. 2025
See All Example Sentences for ozone
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Lisa Cericola, Southern Living, 2 Jan. 2026
Specifically flagged by the UNEP are air pollution from launch emissions, spacecraft emissions in the stratosphere, as well as space debris re-entry and the potential to alter Earth's atmospheric chemistry and dynamics with implications for climate change and depleting stratospheric ozone.
—Leonard David, Space.com, 30 Dec. 2025
Ground level ozone forms as a result of interactions between vehicle and industrial emissions and volatile organic compounds, chemicals in the air that come from a variety of sources, including pesticides.
—Alonso Daboub, Mercury News, 22 Dec. 2025
Meanwhile, Dubai’s Royal Atlantic hotel features an in-house clinic, Aeon, offering advanced treatments ranging from exosome and stem cell therapy to ozone therapy.
—Amy Francombe, Vogue, 19 Dec. 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 7 Jan. 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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