Extraterrestrial
//ˌɛk.stɹə.təˈɹɛs.tɹi.əl// adj, noun
adj, noun ·Moderate ·High school level
Definitions
Noun
- 1 A being originating from outside of the Earth's atmosphere, from space, or from another planet; an alien.
"Smith returns in Men In Black 3 as a veteran agent of a secret organization dedicated to policing the earth’s many extraterrestrials."
- 2 a form of life assumed to exist outside the Earth or its atmosphere wordnet
Adjective
- 1 Originating from outside of the Earth's atmosphere, from space, or from another planet; alien to Earth or its environment.
"Residents of the city of Voronezh insisted today that lanky, three-eyed extraterrestrial creatures had indeed landed in a local park and gone for a stroll and that a seemingly fantastic report about the event carried Monday by the official press agency Tass was absolutely true."
Adjective
- 1 originating or located or occurring outside Earth or its atmosphere wordnet
Example
More examples"Tom wrote a book about a young man who, in the distant future, falls in love with an extraterrestrial girl, during an invasion of the earth."
Etymology
From extra- + terrestrial.
Related phrases
More for "extraterrestrial"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.