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
An Air Quality Alert is also in place for Wednesday, due to ground level ozone concentrations reaching unhealthy standards, NWS forecasters say.
—
Mark Price,
Charlotte Observer,
1 July 2026
Current satellite data measures ozone separately in the lower, middle, and upper stratosphere, and model simulations help scientists work out the causes of any changes in these layers.
—
Scott K. Johnson,
ArsTechnica,
29 June 2026
An air quality alert was issued for Monday in Metro Detroit, and another one for Tuesday in West Michigan, with elevated levels of ozone as the underlying cause.
—
Paula Wethington,
CBS News,
29 June 2026
For the last 25 years, the company has transformed the denim industry through laser, ozone and other sustainable finishing technologies.
—
Angela Velasquez,
Footwear News,
25 June 2026
See All Example Sentences for ozone
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Mark Price,
Charlotte Observer,
1 July 2026
Current satellite data measures ozone separately in the lower, middle, and upper stratosphere, and model simulations help scientists work out the causes of any changes in these layers.
—
Scott K. Johnson,
ArsTechnica,
29 June 2026
An air quality alert was issued for Monday in Metro Detroit, and another one for Tuesday in West Michigan, with elevated levels of ozone as the underlying cause.
—
Paula Wethington,
CBS News,
29 June 2026
For the last 25 years, the company has transformed the denim industry through laser, ozone and other sustainable finishing technologies.
—
Angela Velasquez,
Footwear News,
25 June 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 2 Jul. 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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