Breadcrumb Home > Dictionary > Index K knave: Meaning and Definition of Find definitions for: knave Pronunciation: (nāv), [key] — n. an unprincipled, untrustworthy, or dishonest person. jack (def. 2). a male servant. a man of humble position. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: knave (Thesaurus) knar knavery ✖ Related Content Daily Word Quiz: restive Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language