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.
EVs are intended to reduce greenhouse gas emissions. Bill Koenig, Forbes, 5 Nov. 2024 State of play: One of the biggest fights is over Initiative 2117, which would repeal the state's cap-and-trade law that places a price on carbon emissions. Melissa Santos, Axios, 5 Nov. 2024 Since 2016, the city has reduced greenhouse gas emissions by 28% and is on track to reach 65% by 2030. Erika Page, The Christian Science Monitor, 4 Nov. 2024 Researchers estimate turkey is responsible for almost two-thirds of the emissions produced by the entire meal. London Gibson, The Indianapolis Star, 4 Nov. 2024 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 22 Nov. 2024.

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
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!