Extraterrestrial Definition

ĕkstrə-tə-rĕstrē-əl
adjective
Existing, taking place, or coming from outside the limits of the earth.
Webster's New World
Extraterrestrial is defined as something from space.
An example of extraterrestiral would be intelligent life forms that come from another planet.
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noun

A being originating from outside of the Earth's atmosphere, from space, or from another planet; an alien.

Wiktionary
An extraterrestrial being, as in science fiction.
Webster's New World
Synonyms:
  • alien
  • extraterrestrial being
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Other Word Forms of Extraterrestrial

Noun

Singular:
extraterrestrial
Plural:
extraterrestrials

Origin of Extraterrestrial

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