/ Dictionary / Index J Joab: Meaning and Definition of Find definitions for: Jo•ab Pronunciation: ( jō'ab), [key] — n. a commander of David's army and the slayer of Abner and Absalom. II Sam. 3:27; 18:14. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. jo Joachim 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