/ Dictionary / Index J jazzercise: Meaning and Definition of Find definitions for: jazz•er•cise Pronunciation: ( jaz'ur-sīz"), [key] vigorous dancing done to jazz dance music as an exercise for physical fitness. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. jazz band jazzman Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language