One persons idea of an extraterrestrial.
- Extraterrestrial is defined as something from space.
An example of extraterrestiral would be intelligent life forms that come from another planet.
- The definition of an extraterrestrial is an alien, or a hypothetical or fantasy figure of some intelligent being that lives on a planet other than earth.
An example of an extraterrestrial is the alien E.T. from the movie or Alf from the TV show.
(comparative more extraterrestrial, superlative most extraterrestrial)
extra- + terrestrial