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
Within a city landscape in the capital of Georgia that mixes classical and contemporary architecture, the ultra-modern indoor arena stands out like an extraterrestrial mothership. Felipe Cardenas, New York Times, 30 Apr. 2026 Voiced by Zoey Deutch (with LeVar Burton voicing the Tech Jacket’s AI), Zoe Thompson and her extraterrestrial suit of armor and weaponry arrived in the back half of Season 4, with some inspiration from Kirkman’s own daughter. Glenn Garner, Deadline, 26 Apr. 2026
Noun
Vakoch said that among the early proponents of displaying pictures to communicate with extraterrestrials was the illustrious mathematician Karl Friedrich Gauss. Leonard David, Space.com, 23 Apr. 2026 The Kardashev scale not only gave scientists a new framework for thinking about extraterrestrials, but also a new way to think about humanity. Big Think, 22 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 1 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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