/ Dictionary / Index J jak: Meaning and Definition of Find definitions for: jak Pronunciation: ( jak), [key] — n. jackfruit. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: jak (Thesaurus) Jajapura Jakarta Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language