/ Dictionary / Index F fornication: Meaning and Definition of Find definitions for: for•ni•ca•tion Pronunciation: (fôr"ni-kā'shun), [key] — n. voluntary sexual intercourse between two unmarried persons or two persons not married to each other. idolatry. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fornication (Thesaurus) fornicate fornicatrix Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language