ex·tra·ter·res·tri·al
ˌek-strə-tə-ˈre-strē-əl 
-ˈres-chəl,
-ˈresh-chəl
: originating, existing, or occurring outside the earth or its atmosphere
extraterrestrial life
: a being from another world : an extraterrestrial being
Examples of extraterrestrial in a Sentence
Recent Examples on the Web
Jeremy Engle, New York Times, 25 Apr. 2025
The cold and dark conditions found in South Dakota’s Wind Cave and other caves across the U.S. share some similarities with potential extraterrestrial environments, like caves beneath the surface of Mars or sub-glacial water bodies on the icy moons of Saturn and Jupiter.
—David Bressan, Forbes.com, 17 Apr. 2025
Eric Lagatta, USA Today, 23 Apr. 2025
There are bad actors and there are bad plans, but a conspiracy to hide the existence of extraterrestrials and stuff like that?
—Dana Rose Falcone, People.com, 4 Apr. 2025
See All Example Sentences for extraterrestrial
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Adjective
If there is extraterrestrial life on K2-18b, or anywhere else, its discovery will arrive at a frustratingly slow pace.
—Jeremy Engle, New York Times, 25 Apr. 2025
The cold and dark conditions found in South Dakota’s Wind Cave and other caves across the U.S. share some similarities with potential extraterrestrial environments, like caves beneath the surface of Mars or sub-glacial water bodies on the icy moons of Saturn and Jupiter.
—David Bressan, Forbes.com, 17 Apr. 2025
Noun
Search for extraterrestrials: Could alien life thrive on K2-18b?
—Eric Lagatta, USA Today, 23 Apr. 2025
There are bad actors and there are bad plans, but a conspiracy to hide the existence of extraterrestrials and stuff like that?
—Dana Rose Falcone, People.com, 4 Apr. 2025
See All Example Sentences for extraterrestrial
Cite this Entry
“Extraterrestrial.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/extraterrestrial. Accessed 20 May. 2025.
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