/ Dictionary / Index J Jacksonville Beach: Meaning and Definition of Find definitions for: Jack'sonville Beach' Pronunciation: [key] a city in NE Florida. 15,462. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Jacksonville jack staff Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language