Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps


Adjective: extraterrestrial  ,ek-stru-tu'res-tree-ul
  1. Originating or located or occurring outside Earth or its atmosphere
    "is there extraterrestrial life?"
Noun: extraterrestrial  ,ek-stru-tu'res-tree-ul
  1. A form of life assumed to exist outside the Earth or its atmosphere
    - extraterrestrial being, alien, ET

Derived forms: extraterrestrials

Type of: hypothetical creature

Encyclopedia: Extraterrestrial