extraterrestrial

1 of 2

adjective

ex·​tra·​ter·​res·​tri·​al ˌek-strə-tə-ˈre-strē-əl How to pronounce extraterrestrial (audio)
-ˈres-chəl,
-ˈresh-chəl
: originating, existing, or occurring outside the earth or its atmosphere
extraterrestrial life

extraterrestrial

2 of 2

noun

: a being from another world : an extraterrestrial being

Examples of extraterrestrial in a Sentence

Recent Examples on the Web
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.
Adjective
One of Johnson’s timeliest essays, though, is about Alien, Ridley Scott’s 1979 sci-fi horror about an extraterrestrial creature that forcibly impregnates a member of a commercial hauling ship, killing him when the alien fetus bursts out of his abdomen. Sophie Gilbert, The Atlantic, 30 Oct. 2025 In the absurdist black comedy, Stone stars as Michelle Fuller, the powerful CEO of pharmaceutical company Auxolith, who is kidnapped by Teddy (Jesse Plemons), a conspiracy theorist convinced that Michelle is really an Andromedan — an extraterrestrial sent to Earth to destroy it. Lauren Huff, Entertainment Weekly, 29 Oct. 2025
Noun
The following ghosts, monsters, and extraterrestrials just may haunt your dreams. Josh Honeycutt, Outdoor Life, 30 Oct. 2025 The idea that nuclear weapons have long attracted the interest of extraterrestrials is strongly ingrained within UFO mythology. Eric Lagatta, USA Today, 28 Oct. 2025 See All Example Sentences for extraterrestrial

Word History

First Known Use

Adjective

1848, in the meaning defined above

Noun

1950, in the meaning defined above

Time Traveler
The first known use of extraterrestrial was in 1848

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Cite this Entry

“Extraterrestrial.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/extraterrestrial. Accessed 5 Nov. 2025.

Kids Definition

extraterrestrial

adjective
ex·​tra·​ter·​res·​tri·​al
ˌek-strə-tə-ˈres-trē-əl
: coming from or existing outside the earth or its atmosphere
extraterrestrial life
extraterrestrial noun

More from Merriam-Webster on extraterrestrial

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