English Lexicon

Extraterrestrial

/ˌɛk.strə.təˈrɛs.tri.əl/
adjectivenounCEFR B2 (Upper)Top #4500 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    A being or life form that originates from outside Earth.

    "Scientists are searching for signs of extraterrestrial life on Mars."
As adjective
  1. 1

    Relating to or denoting beings or phenomena that are not of this Earth.

    "The movie explores extraterrestrial civilizations and their impact on humanity."

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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

Derived from the Medieval Latin word 'extraterrestris', composed of the Latin prefix 'extra-' (meaning outside of or beyond) combined with 'terrestris' (pertaining to the Earth, from 'terra' meaning earth). It entered the English language in the late 19th century initially as an adjective describing phenomena outside Earth, later expanding in the mid-20th century to describe life forms originating beyond our planet.

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