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Adjective extraterrestrial has 1 sense
  1. extraterrestrial - originating or located or occurring outside Earth or its atmosphere; "is there extraterrestrial life?"
,Noun extraterrestrial has 1 sense
  1. extraterrestrial being, extraterrestrial, alien - a form of life assumed to exist outside the Earth or its atmosphere
    --1 is a kind of hypothetical creature
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