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
Pamela Brill, Parents, 2 Oct. 2025
All of this raises the probability that extraterrestrial life exists in the moon’s subsurface ocean.
—Chris Young, Interesting Engineering, 2 Oct. 2025
Eric Lagatta, USA Today, 2 Oct. 2025
However, the actress is too afraid of the series' menacing extraterrestrials to watch the show alone.
—Wesley Stenzel, Entertainment Weekly, 11 Sep. 2025
See All Example Sentences for extraterrestrial
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Adjective
This imaginative play set comes with two extra-squishy extraterrestrial creatures that sit inside their detachable floating bases.
—Pamela Brill, Parents, 2 Oct. 2025
All of this raises the probability that extraterrestrial life exists in the moon’s subsurface ocean.
—Chris Young, Interesting Engineering, 2 Oct. 2025
Noun
Loeb has long had a preoccupation with extraterrestrials – even co-founding the Galileo Project, a research program at the Harvard-Smithsonian Center for Astrophysics dedicated to the search for alien life.
—Eric Lagatta, USA Today, 2 Oct. 2025
However, the actress is too afraid of the series' menacing extraterrestrials to watch the show alone.
—Wesley Stenzel, Entertainment Weekly, 11 Sep. 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 4 Oct. 2025.
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