emission
noun
emis·sion
ē-ˈmi-shən 
1
a
: an act or instance of emitting : emanation
b
archaic
: publication
c
: a putting into circulation
2
a
: something sent forth by emitting: such as
(1)
: electromagnetic radiation from an antenna or a celestial body
(2)
usually emissions
: substances discharged into the air (as by a smokestack or an automobile engine)
b
Examples of emission in a Sentence
trying to reduce the emission of greenhouse gases
Recent Examples on the Web
The more stringent standards effectively limit emissions of other toxics, including benzene, lead and arsenic.
—
Michael Hawthorne, Chicago Tribune, 25 May 2025
For years, climate advocates have argued that slowing emissions requires governments to embed climate throughout government policy—including and especially economic policy.
—Justin Worland, Time, 23 May 2025
That same chapter also recommends that the president undermine California’s ability to set strict vehicle emission standards, which Trump vowed to do shortly after taking office; the Senate this week voted to revoke California’s rights to enact policy on the issue.
—Hayley Smith, Los Angeles Times, 23 May 2025
These distinctly audible explosions were accompanied by the emission of red flames or liquid rising 10 feet or more above the summit, and blocks or bombs were thrown 1000 feet in the air.
—The Editors, JSTOR Daily, 23 May 2025
See All Example Sentences for emission
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Michael Hawthorne, Chicago Tribune, 25 May 2025
For years, climate advocates have argued that slowing emissions requires governments to embed climate throughout government policy—including and especially economic policy.
—Justin Worland, Time, 23 May 2025
That same chapter also recommends that the president undermine California’s ability to set strict vehicle emission standards, which Trump vowed to do shortly after taking office; the Senate this week voted to revoke California’s rights to enact policy on the issue.
—Hayley Smith, Los Angeles Times, 23 May 2025
These distinctly audible explosions were accompanied by the emission of red flames or liquid rising 10 feet or more above the summit, and blocks or bombs were thrown 1000 feet in the air.
—The Editors, JSTOR Daily, 23 May 2025
See All Example Sentences for emission
Cite this Entry
“Emission.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/emission. Accessed 29 May. 2025.
Copy CitationKids Definition
emission
noun
emis·sion
ē-ˈmish-ən
1
: an act or instance of emitting
2
: something emitted or discharged
Medical Definition
emission
noun
emis·sion
ē-ˈmish-ən
1
: an act or instance of emitting
2
a
: something sent forth by emitting: as
(1)
: electrons discharged from a surface
(2)
: electromagnetic waves radiated by an antenna or a celestial body
(3)
: substances and especially pollutants discharged into the air (as by a smokestack or an automobile gasoline engine)
b
: a discharge of fluid from a living body
especially
: ejaculate see nocturnal emission
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