/ Dictionary / Index J jackfish: Meaning and Definition of Find definitions for: jack•fish Pronunciation: ( jak'fish"), [key] — -fish, -fish•es. any of several pikes, esp. the northern pike. the sauger. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. jackey Jack Frost Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language