emission

noun emis·sion \ē-ˈmi-shən\

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

: something sent out or given off

Full Definition of EMISSION

a : an act or instance of emitting : emanation

b archaic : publication

c : a putting into circulation

a : something sent forth by emitting: as (1) : electromagnetic radiation from an antenna or a celestial body (2) usually plural : substances discharged into the air (as by a smokestack or an automobile engine)

b : effluvium

— emis·sive \-ˈmi-siv\ adjective

See emission defined for English-language learners

See emission defined for kids

First Known Use of EMISSION

1607

Other Automotive Terms

articulated, block, choke, clutch, diesel, neutral, transmission

Rhymes with EMISSION

ambition, audition, commission, condition, munition, partition, patrician, petition, Phoenician, position, suspicion, transition

EMISSION Defined for Kids

emission

noun emis·sion \ē-ˈmi-shən\

Definition of EMISSION for Kids

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

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

Medical Dictionary

emission

noun emis·sion \ē-ˈmish-ən\

Medical Definition of EMISSION

: an act or instance of emitting

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