/ Dictionary / Index J jactitation: Meaning and Definition of Find definitions for: jac•ti•ta•tion Pronunciation: ( jak"ti-tā'shun), [key] — n. a false boast or claim that causes injury to another. jactation (def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: jactitation (Thesaurus) jactation jaculate Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language