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
Japan could then subtract those emissions from its total carbon output.
—
ABC News, 17 Feb. 2026
Oil and natural gas were discussed not as obstacles, but as enablers, supporting grid stability, and economic growth while continuing to reduce emissions.
—Lynn Granger, Denver Post, 17 Feb. 2026
With growing environmental pressures, engineers have lately been hard-pressed to develop circular approaches that use industrial CO₂ emissions to produce valuable chemicals.
—Srishti Gupta, Interesting Engineering, 16 Feb. 2026
Osborne and Miner wanted the show to address several current issues – from ICE entering schools to the rise of global carbon emissions to voting rights.
—Anya Sesay, jsonline.com, 16 Feb. 2026
See All Example Sentences for emission
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show current usage.
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ABC News, 17 Feb. 2026
Oil and natural gas were discussed not as obstacles, but as enablers, supporting grid stability, and economic growth while continuing to reduce emissions.
—Lynn Granger, Denver Post, 17 Feb. 2026
With growing environmental pressures, engineers have lately been hard-pressed to develop circular approaches that use industrial CO₂ emissions to produce valuable chemicals.
—Srishti Gupta, Interesting Engineering, 16 Feb. 2026
Osborne and Miner wanted the show to address several current issues – from ICE entering schools to the rise of global carbon emissions to voting rights.
—Anya Sesay, jsonline.com, 16 Feb. 2026
See All Example Sentences for emission
Cite this Entry
“Emission.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/emission. Accessed 19 Feb. 2026.
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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