/ Dictionary / Index H high jinks: Meaning and Definition of Find definitions for: high' jinks" Pronunciation: [key] — Informal. Informal. boisterous celebration or merrymaking; unrestrained fun: The city is full of conventioneers indulging in their usual high jinks. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. highjacker high jump Related Content Daily Word Quiz: hedonist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language