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
These reactions require sunlight and higher temperatures, making warmer months more prone to ozone formation.
—
Joe Edwards, MSNBC Newsweek, 27 June 2025
Smoke from the fires, along with ozone from heat, raised air pollution levels in Minneapolis, Green Bay, Indianapolis, Cincinnati, Columbus, Pittsburgh, Washington, Philadelphia and New York, among other cities.
—Evan Bush, NBC news, 12 June 2025
Shelby county has an F in air quality for ozone levels from the American Lung Association and the highest rates of children hospitalized for asthma in Tennessee.
—Laura Paddison, CNN Money, 19 May 2025
The intent to sue also claims xAI’s operations in Black neighborhoods increased the existing level of ozone pollution in Memphis, which could lead to irritation to peoples’ lungs and cause asthma attacks.
—Yezen Saadah, Forbes.com, 17 June 2025
See All Example Sentences for ozone
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Joe Edwards, MSNBC Newsweek, 27 June 2025
Smoke from the fires, along with ozone from heat, raised air pollution levels in Minneapolis, Green Bay, Indianapolis, Cincinnati, Columbus, Pittsburgh, Washington, Philadelphia and New York, among other cities.
—Evan Bush, NBC news, 12 June 2025
Shelby county has an F in air quality for ozone levels from the American Lung Association and the highest rates of children hospitalized for asthma in Tennessee.
—Laura Paddison, CNN Money, 19 May 2025
The intent to sue also claims xAI’s operations in Black neighborhoods increased the existing level of ozone pollution in Memphis, which could lead to irritation to peoples’ lungs and cause asthma attacks.
—Yezen Saadah, Forbes.com, 17 June 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 5 Jul. 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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