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
Among other things, its instruments drilled into the Moon's surface, tested an extraterrestrial vacuum cleaner, and showed that future missions could use GPS navigation signals to navigate on the lunar surface. Ars Technica, 18 Mar. 2025 However, the extraterrestrial enemies catch up to the ship and force it to crash-land on a mysterious planet called Mira. PCMAG, 18 Mar. 2025
Noun
For the anniversary special, Streep played Colleen Rafferty Sr., the equally unfiltered mother who also had raunchy run-ins with extraterrestrials. Terry Dickerson, NBC News, 12 Mar. 2025 Discovering a mysterious beam of light during a graveyard shift, Bruner reawakens with visions of extraterrestrials and a slippery sense of reality. J. Kim Murphy, Variety, 6 Mar. 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 24 Mar. 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

Last Updated: - Updated example sentences
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