A form of life assumed to exist outside the Earth or its atmosphere

lifeform that does not originate from Earth

Extraterrestrial is a British-American two-part television documentary miniseries, aired in 2005 in the UK by Channel 4, by the National Geographic Channel in the US on Monday, May 30, 2005 and produced by Big Wave Productions Ltd. The program focuses on the hypothetical and scientifically feasible evolution of alien life on extrasolar planets, providing model examples of two different fictional worlds, one in each of the series's two episodes.

Extraterrestrial is a 2014 Canadian science fiction horror film that was directed by Colin Minihan—one half of the Vicious Brothers, who co-produced, wrote, and edited the film.

Extraterrestrial is a 2011 Spanish science-fiction romantic comedy written and directed by Nacho Vigalondo and starring Michelle Jenner, Julián Villagrán and Carlos Areces.

Extraterrestrial: The First Sign of Intelligent Life Beyond Earth is a popular science book written by American theoretical physicist and Harvard University astronomer Avi Loeb, published by Houghton Mifflin Harcourt on 26 January 2021.

"Extraterrestrial" is a song by American electronic music producer Tynan and Los Angeles-based dubstep producer Kompany.

Originating or located or occurring outside Earth or its atmosphere