emission

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noun emis·sion \ē-ˈmi-shən\

Definition of emission

  1. 1a :  an act or instance of emitting :  emanationb archaic :  publicationc :  a putting into circulation

  2. 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

emissive

play \ē-ˈmi-siv\ adjective

Examples of emission in a Sentence

  1. trying to reduce the emission of greenhouse gases

Recent Examples of emission from the Web

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

Other Automotive Terms


EMISSION Defined for English Language Learners

emission

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noun

Definition of emission for English Language Learners

  • : the act of producing or sending out something (such as energy or gas) from a source

  • : something sent out or given off


EMISSION Defined for Kids

emission

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noun emis·sion \ē-ˈmi-shən\

Definition of emission for Students

  1. 1 :  the act of giving off The energy plant is reducing the emission of harmful gases.

  2. 2 :  something that is given off Scientists can record radio emissions from far-off stars.


Medical Dictionary

emission

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noun emis·sion \ē-ˈmish-ən\

Medical Definition of emission

  1. 1:  an act or instance of emitting

  2. 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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