In popular cultures, "Extraterrestrials" are life forms — especially intelligent life forms— that are of extraterrestrial origin (often also called "aliens").
Famous quotes containing the word life:
“Kittering’s brain. What we will he think when he resumes life in that body? Will he thank us for giving him a new lease on life? Or will he object to finding his ego living in that human junk heap?”
—W. Scott Darling, and Erle C. Kenton. Dr. Frankenstein (Sir Cedric Hardwicke)