/ Dictionary / Index J jestbook: Meaning and Definition of Find definitions for: jest•book Pronunciation: ( jest'book"), [key] — n. a book of jests or jokes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. jest jester Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language