/ Dictionary / Index M Martian: Meaning and Definition of Find definitions for: Mar•tian Pronunciation: (mär'shun), [key] — adj. of, pertaining to, or like the planet Mars or its hypothetical inhabitants. —n. a supposed inhabitant of the planet Mars: The science fiction novel was about the invasion of Earth by Martians. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: martian (Thesaurus) martial law martin Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language