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
The active stratovolcano is known for its frequent and persistent eruptions and volcanic activity in the region can range from explosive eruptions to lava flows and ash emissions, USGS says.
—
Saman Shafiq, USA TODAY, 18 Feb. 2025
Given the urgency, many advocate for eating less meat as a solution to reduce greenhouse gas emissions.
—Arturo MacIas Franco, San Diego Union-Tribune, 18 Feb. 2025
Instead, agencies could define significance based on measurable criteria like acres of land disturbed or emission levels.
—James Broughel, Forbes, 18 Feb. 2025
Meanwhile, the United States has made incredible strides to reduce carbon emissions.
—Toby Overdorf, Sun Sentinel, 18 Feb. 2025
See all Example Sentences for emission 
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Saman Shafiq, USA TODAY, 18 Feb. 2025
Given the urgency, many advocate for eating less meat as a solution to reduce greenhouse gas emissions.
—Arturo MacIas Franco, San Diego Union-Tribune, 18 Feb. 2025
Instead, agencies could define significance based on measurable criteria like acres of land disturbed or emission levels.
—James Broughel, Forbes, 18 Feb. 2025
Meanwhile, the United States has made incredible strides to reduce carbon emissions.
—Toby Overdorf, Sun Sentinel, 18 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 22 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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share