View synonyms for emission


[ ih-mish-uhn ]


  1. an act or instance of emitting:

    the emission of poisonous fumes.

  2. something that is emitted; discharge; emanation.
  3. an act or instance of issuing, as paper money.
  4. Electronics. a measure of the number of electrons emitted by the heated filament or cathode of a vacuum tube.
  5. an ejection or discharge of semen or other fluid from the body.

    Synonyms: ejaculation

  6. the fluid ejected or discharged.

    Synonyms: ejaculate


/ ɪˈmɪʃən /


  1. the act of emitting or sending forth
  2. energy, in the form of heat, light, radio waves, etc, emitted from a source
  3. a substance, fluid, etc, that is emitted; discharge
  4. a measure of the number of electrons emitted by a cathode or electron gun See also secondary emission thermionic emission

    at 1000°C the emission is 3 mA

  5. physiol any bodily discharge, esp an involuntary release of semen during sleep
  6. an issue, as of currency
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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Derived Forms

  • eˈmissive, adjective
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Other Words From

  • none·mission noun
  • ree·mission noun
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Word History and Origins

Origin of emission1

First recorded in 1600–10; from Middle French or directly from Latin ēmissiōn- (stem of ēmissiō ), equivalent to ēmiss(us), past participle of ēmittere “to send forth” ( ē- “from, out of” + mit-, stem of mittere “to send” + -tus past participle suffix) + -iōn- noun suffix; emit, e- 1, -ion
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Word History and Origins

Origin of emission1

C17: from Latin ēmissiō, from ēmittere to send forth, emit
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Example Sentences

Three studies published this week examine some of the issues of negative emissions in detail.

Those data show that jumps in CO2 emissions happened at about the same time as strong earthquakes, and emissions dropped off when quakes were smaller and farther between.

Major oil and gas companies, particularly in Europe, have pledged to cut their emissions dramatically—leaving the future of their assets, some of them still un-drilled, in question.

From Fortune

Studies have shown the product to reduce methane emissions by about 20 percent in meat cattle, according to the New York Times.

The fee price would then drop as carbon emissions drop, he said.

The United States and China announced new greenhouse emission targets late Tuesday night.

The joint-announcement should also put to bed long-term disagreements between Beijing and Washington over emission targets.

However, researchers measured a decrease in X-ray emission last year: something new was blocking the light from reaching us.

“Climate change” itself is now a dirty emission rarely uttered from the mouths of Republican leaders.

Not words, of course, but an ongoing emission of verbal fragments.

On the other hand, if too thin the emission is comparatively easy, but lacks intensity and is termed "hollow."

The violin was of good reputation for its tone of fine quality, quantity and ease of emission.

The emission of odors and acute sensibility to them is the only presumable agency at work in those instances.

Thereupon his anxiety became extreme, and simultaneously he experienced his first seminal emission.

On one occasion, however, he had a seminal emission during the night in association with a feeling of anxiety.


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More About Emission

What does emission mean?

An emission is something that has been emitted—released or discharged. In general, emissions consist of things like gas, liquid, heat, sound, light, and radiation.

Emissions can come from natural sources or from machines. A specific example of an emission is the exhaust from cars (in the U.S., such emissions are regulated through emissions tests). This exhaust is just one form of carbon emissionsgreenhouse gases from various sources that are known to contribute to global warming and climate change.

Emission can also refer to an instance or the process of emitting, as in This filter is designed to reduce the emission of light. 

Example: Carbon dioxide emissions from volcanoes are much lower than those from cars and airplanes.

Where does emission come from?

The first records of the word emission come from the early 1600s. It ultimately derives from the Latin verb ēmittere, from e-, meaning “out of,” and mittere, “to send.”

An emission is something sent out from something else. Such emissions are often by-products released during the course of other processes—such as smoke being emitted from a factory or heat being emitted from a machine. Emissions from cars and airplanes come from the burning of fuel by their engines. In physics and electronics, the word is used in a more specific way to refer to the amount of electrons being emitted from an object.

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What are some other forms related to emission?

  • emissive (adjective)
  • nonemission (noun)
  • reemission (verb)
  • emit (verb)

What are some synonyms for emission?

What are some words that share a root or word element with emission

What are some words that often get used in discussing emission?

How is emission used in real life?

Emissions are usually discussed in technical or scientific contexts.



Try using emission!

An emission can consist of which of the following things?

A. liquid
B. gas
C. sound
D. all of the above




emissaryemission nebula