Extraterrestrial Definition

ĕkstrə-tə-rĕstrē-əl
adjective
Existing, taking place, or coming from outside the limits of the earth.
Webster's New World
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

Other Word Forms of Extraterrestrial

Noun

Singular:
extraterrestrial
Plural:
extraterrestrials

Origin of Extraterrestrial

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