extraterrestrial Syllabification: (ex·tra·ter·res·tri·al)Pronunciation: /ˌekstrətəˈrestrēəl/Translate extraterrestrial | into French | into Italian Definition of extraterrestrial adjective of or from outside the earth or its atmosphere:searches for extraterrestrial intelligence noun a hypothetical or fictional being from outer space, especially an intelligent one. extraterrestrial in other Oxford dictionaries Definition of extraterrestrial in the British & World English dictionary
