emission
noun
emis·sion
ē-ˈmi-shən 
1
a
: an act or instance of emitting : emanation
b
archaic
: publication
c
: a putting into circulation
2
a
: 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
Examples of emission in a Sentence
trying to reduce the emission of greenhouse gases
Recent Examples on the Web
By 2030, the absolute greenhouse gas emissions of the company’s fleet are to be reduced by around a third compared to 2022.
—
Glenn Taylor, Sourcing Journal, 6 Feb. 2025
Burgess said the main driver of climate change remains emissions of heat-trapping greenhouse gases.
—Doyle Rice, USA TODAY, 6 Feb. 2025
Earth’s surface has now been so warm for so much of the past two years that scientists are examining whether something else in the planet’s chemistry might have changed, something that is boosting temperatures beyond what carbon emissions alone can explain.
—Raymond Zhong, New York Times, 6 Feb. 2025
The more than $1 billion investments in current Ohio facilities also include several new manufacturing processes and techniques to lower emissions and waste, including using a special form of structural aluminum for the EV battery packs that can be recycled and reused.
—Michael Wayland, CNBC, 2 Feb. 2025
See all Example Sentences for emission 
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Glenn Taylor, Sourcing Journal, 6 Feb. 2025
Burgess said the main driver of climate change remains emissions of heat-trapping greenhouse gases.
—Doyle Rice, USA TODAY, 6 Feb. 2025
Earth’s surface has now been so warm for so much of the past two years that scientists are examining whether something else in the planet’s chemistry might have changed, something that is boosting temperatures beyond what carbon emissions alone can explain.
—Raymond Zhong, New York Times, 6 Feb. 2025
The more than $1 billion investments in current Ohio facilities also include several new manufacturing processes and techniques to lower emissions and waste, including using a special form of structural aluminum for the EV battery packs that can be recycled and reused.
—Michael Wayland, CNBC, 2 Feb. 2025
See all Example Sentences for emission
Dictionary Entries Near emission
Cite this Entry
“Emission.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/emission. Accessed 9 Feb. 2025.
Copy CitationKids Definition
emission
noun
emis·sion
ē-ˈmish-ən
1
: an act or instance of emitting
2
: something emitted or discharged
Medical Definition
emission
noun
emis·sion
ē-ˈmish-ən
1
: an act or instance of emitting
2
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
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