/ Dictionary / Index J jack-a-dandy: Meaning and Definition of Find definitions for: jack-a-dan•dy Pronunciation: ( jak"u-dan'dē), [key] — pl. -dies. dandy (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. jack jackal Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language