extraterrestrial

extra|ter|res|trial /'ekstrətɪr'estriəl/ (extraterrestrials)
also extra-terrestrial
1 [ADJ] usu ADJ n
Extraterrestrial means happening, existing, or coming from somewhere beyond the planet Earth. (FORMAL)
NASA has started a 10-year search for extraterrestrial intelligence.
...extraterrestrial rocks.
2 [N-COUNT]
Extraterrestrials are living creatures that some people think exist or may exist in another part of the universe.

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