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
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Adjective
In the slant, Shao sees evidence for an extraterrestrial, even extragalactic origin for lightning — a cosmic-ray shower. Quanta Magazine, 6 May 2026 The characters of Prince Adam, He-Man’s alter ego, dressed in a pink vest and seen by some fans as an icon for the LGBTQ+ community, and Orko, a blundering extraterrestrial wizard who helps the prince, were introduced as action figures in 1984. Sanat Pai Raikarall, Encyclopedia Britannica, 4 May 2026
Noun
Trump started stoking interest in the extraterrestrial in February, directing federal agencies to release their records related to extraterrestrial life and UFOs. ABC News, 3 May 2026 Trump started stoking interest in the extraterrestrial in February, directing federal agencies to release their records related to extraterrestrial life and UFOs. Collin Binkley, Fortune, 30 Apr. 2026 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 14 May. 2026.

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

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