emission

noun

emis·​sion ē-ˈmi-shən How to pronounce emission (audio)
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
emissive adjective

Examples of emission in a Sentence

trying to reduce the emission of greenhouse gases
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Environmentalists cringe at the implications for climate change — electricity generation accounts for one-quarter of U.S. carbon emissions, according to the EPA — but miners welcome the shift. Matthew Brown, Chicago Tribune, 24 Jan. 2025 While the agricultural sector only accounts for 10% of greenhouse gas emissions, roughly 70% of agricultural methane comes from enteric fermentation, which is done in the stomachs of cows and other grazing animals. Heide Brandes, thehustle.co, 24 Jan. 2025 Amazon, Microsoft and other companies that have made ambitious climate goals are this year touting A.I., a technology that is forcing them to walk back their emissions reduction targets and consuming vast quantities of electricity, much of it generated with fossil fuels. David Gelles, New York Times, 23 Jan. 2025 But the true impact lies in their ethical foundation: reducing carbon emissions to combat climate change and protect future generations. Karlo Tanjuakio, Forbes, 23 Jan. 2025 See all Example Sentences for emission 

Word History

First Known Use

1607, in the meaning defined at sense 1a

Time Traveler
The first known use of emission was in 1607

Dictionary Entries Near emission

Cite this Entry

“Emission.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/emission. Accessed 30 Jan. 2025.

Kids Definition

emission

noun
emis·​sion ē-ˈmish-ən How to pronounce emission (audio)
1
: an act or instance of emitting
2
: something emitted or discharged
emissive adjective

Medical Definition

emission

noun
emis·​sion ē-ˈmish-ən How to pronounce emission (audio)
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
Last Updated: - Updated example sentences
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