/ Dictionary / Index J jackanapes: Meaning and Definition of Find definitions for: jack•a•napes Pronunciation: ( jak'u-nāps"), [key] — n. an impertinent, presumptuous person, esp. a young man; whippersnapper. an impudent, mischievous child. an ape or monkey. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: jackanapes (Thesaurus) jackal jack arch Related Content Daily Word Quiz: serendipity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language