extraterrestrial n. A hypothetical form of life existing outside the Earth or its atmosphere, especially intelligent life on other planets or in other solar systems; as, what would you say to an extraterrestrial?.
... wanted to take over the Earth, couldn't they do it by a show of force? Or are they mild-mannered supermen, only quietly interested in overrunning the human race and waiting out the inevitable decline of normal homo sapiens? You're not endowing them with extraterrestrial... — Highways in Hiding • George Oliver Smith
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