/ Dictionary / Index A altruistic: Meaning and Definition of Find definitions for: al•tru•is•tic Pronunciation: (al"tr-is'tik), [key] — adj. unselfishly concerned for or devoted to the welfare of others (opposed to egoistic). of or pertaining to behavior by an animal that may be to its disadvantage but that benefits others of its kind, often its close relatives. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: altruistic (Thesaurus) altruist Altus Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language