Definition of emission in English:

Share this entry


Pronunciation: /ɪˈmɪʃ(ə)n/


[mass noun]
1The production and discharge of something, especially gas or radiation: the effects of lead emission on health [count noun]: cuts in carbon dioxide emissions
More example sentences
  • This random emission of photons leaves the resulting electron beam with a fuzzy, rather than a sharply defined focus.
  • Radioactivity is the process of emission of radiation as a radioactive material changes form, often to a different element.
  • Radiation emission from mobile phones must be cut by 80 per cent, a group of UK MPs said yesterday.
discharge, release, outpouring, outflow, outrush, leak, excretion, secretion, ejection;
emanation, radiation, exhalation, exudation, exuding, venting, effusion, ejaculation, disgorgement, issuance, issue;
oozing, leaking
1.1 [count noun] An ejaculation of semen: nocturnal emissions
More example sentences
  • Even well into this century, versions of this dire belief - that one's bodily supply of energy could be squandered by sexual emissions - hung on.


Late Middle English (in the sense 'emanation'): from Latin emissio(n-), from emiss- 'sent out', from the verb emittere (see emit).

  • An emission is literally something sent out, coming from Latin emittere ‘to send out’. An emissary (early 17th century) is a person sent out, and comes from Latin emissarius ‘scout, spy’, from emittere. Emit (early 17th century) is from the same source.

Words that rhyme with emission

academician, addition, aesthetician (US esthetician), ambition, audition, beautician, clinician, coition, cosmetician, diagnostician, dialectician, dietitian, Domitian, edition, electrician, fission, fruition, Hermitian, ignition, linguistician, logician, magician, mathematician, Mauritian, mechanician, metaphysician, mission, monition, mortician, munition, musician, obstetrician, omission, optician, paediatrician (US pediatrician), patrician, petition, Phoenician, physician, politician, position, rhetorician, sedition, statistician, suspicion, tactician, technician, theoretician, Titian, tuition, volition

For editors and proofreaders

Line breaks: emis|sion

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.