emis·​sion | \ ē-ˈmi-shən How to pronounce emission (audio) \

Definition of emission

1a : an act or instance of emitting : emanation
b archaic : publication
c : a putting into circulation
2a : 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 : effluvium

Other Words from emission

emissive \ ē-​ˈmi-​siv How to pronounce emission (audio) \ adjective

Examples of emission in a Sentence

trying to reduce the emission of greenhouse gases
Recent Examples on the Web Nikola Corp founder Trevor Milton became a billionaire by lying to investors about the most important aspects of his low-emission vehicle company, a prosecutor told jurors as Milton’s fraud trial began on Tuesday. Reuters, CNN, 13 Sep. 2022 The bill, which Democrats named the Inflation Reduction Act, invests $370 billion in spending and tax credits in low-emission forms of energy to fight climate change. Jim Tankersley, BostonGlobe.com, 16 Aug. 2022 There are, however, only so many low-emission producers and suppliers on the market, says Randall, so there’s going to be fierce competition to secure contracts ahead of rivals. Alasdair Lane, Fortune, 1 Aug. 2022 Economists largely agree that raising the prices of fossil fuels like coal and gasoline is a way to ensure that consumers burn less of them and to encourage switching to lower-emission alternatives like electric vehicles. New York Times, 22 July 2022 Superintendent Dan Bridges said the district intends to apply for funding for zero- and low-emission buses through the Infrastructure Investment and Jobs Act of 2021. Giles Bruce, Chicago Tribune, 28 June 2022 Low-emission car registrations have more than doubled in five years, but gas and diesel still rule the road — and the sales stats. Tim Fitzpatrick, The Salt Lake Tribune, 10 June 2022 Create a Zero-emission buses bill to improve my district's (County) fleet. Baltimore Sun, 18 May 2022 In the world’s transition to lower-emission fuels, politics is a big part of both the solution and the problem. Rochelle Toplensky, WSJ, 6 May 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'emission.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of emission

1607, in the meaning defined at sense 1a

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Time Traveler for emission

Time Traveler

The first known use of emission was in 1607

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Dictionary Entries Near emission



emission line

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Statistics for emission

Last Updated

21 Sep 2022

Cite this Entry

“Emission.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/emission. Accessed 3 Oct. 2022.

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More Definitions for emission


emis·​sion | \ ē-ˈmi-shən How to pronounce emission (audio) \

Kids Definition of emission

1 : the act of giving off The energy plant is reducing the emission of harmful gases.
2 : something that is given off Scientists can record radio emissions from far-off stars.


emis·​sion | \ ē-ˈmish-ən How to pronounce emission (audio) \

Medical Definition of emission

1 : an act or instance of emitting
2a : 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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