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
Jackie Flynn Mogensen, Scientific American, 4 June 2026
While the existence of extraterrestrial life remains unconfirmed, Moxley and Ricciardi point to the history of invasive species on Earth that serves as a warning.
—Leonard David, Space.com, 3 June 2026
Harmeet Kaur, CNN Money, 3 June 2026
The webpage equates undocumented immigrants with extraterrestrials.
—Brittney Melton, NPR, 3 June 2026
See All Example Sentences for extraterrestrial
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Adjective
And so did scientists involved in the search for extraterrestrial intelligence (SETI).
—Jackie Flynn Mogensen, Scientific American, 4 June 2026
While the existence of extraterrestrial life remains unconfirmed, Moxley and Ricciardi point to the history of invasive species on Earth that serves as a warning.
—Leonard David, Space.com, 3 June 2026
Noun
Crucially, Ngai says, the term for extraterrestrials flowed from the word for foreigners, not the other way around.
—Harmeet Kaur, CNN Money, 3 June 2026
The webpage equates undocumented immigrants with extraterrestrials.
—Brittney Melton, NPR, 3 June 2026
See All Example Sentences for extraterrestrial
Cite this Entry
“Extraterrestrial.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/extraterrestrial. Accessed 6 Jun. 2026.
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