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
But that won’t be enough to meaningfully cut emissions while fossil fuels enjoy strong markets across the Middle East, Asia, and Africa.
—
Natasha Bracken, semafor.com, 7 Apr. 2026
Most industrial businesses in NYC do not own or operate their own trucking fleet but rely on independent carriers and contract haulers and have no practical mechanism to comply with fleet-level emissions mandates.
—Laura Rothrock, New York Daily News, 7 Apr. 2026
These measurable outcomes provide evidence, allowing brands and retailers to strengthen sustainability claims, support Scope 3 emissions reduction strategies and meet emerging regulatory compliance like the EU’s Corporate Sustainability Reporting Directive (CSRD).
—Sj Studio, Footwear News, 6 Apr. 2026
Recent advances in ultrafast measurement techniques have revealed that electron emission is not instantaneous, as once believed, but influenced by complex interactions within atoms.
—Prabhat Ranjan Mishra, Interesting Engineering, 6 Apr. 2026
See All Example Sentences for emission
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Natasha Bracken, semafor.com, 7 Apr. 2026
Most industrial businesses in NYC do not own or operate their own trucking fleet but rely on independent carriers and contract haulers and have no practical mechanism to comply with fleet-level emissions mandates.
—Laura Rothrock, New York Daily News, 7 Apr. 2026
These measurable outcomes provide evidence, allowing brands and retailers to strengthen sustainability claims, support Scope 3 emissions reduction strategies and meet emerging regulatory compliance like the EU’s Corporate Sustainability Reporting Directive (CSRD).
—Sj Studio, Footwear News, 6 Apr. 2026
Recent advances in ultrafast measurement techniques have revealed that electron emission is not instantaneous, as once believed, but influenced by complex interactions within atoms.
—Prabhat Ranjan Mishra, Interesting Engineering, 6 Apr. 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 8 Apr. 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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