Definition of terrestrial adjective from the Oxford Advanced Learner's Dictionary



    BrE BrE//təˈrestriəl//
    ; NAmE NAmE//təˈrestriəl//
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  1. 1(specialist) (of animals and plants) living on the land or on the ground, rather than in water, in trees or in the air a terrestrial habitat
  2. 2connected with the planet Earth terrestrial life compare celestial, extraterrestrial
  3. 3(of television and broadcasting systems) operating on earth rather than from a satellite
  4. Word Originlate Middle English (in the sense ‘temporal, worldly, mundane’): from Latin terrestris (from terra ‘earth’) + -al.
See the Oxford Advanced American Dictionary entry: terrestrial