/ Dictionary / Index J jib boom: Meaning and Definition of Find definitions for: jib' boom" Pronunciation: [key] — Naut. Naut. a spar forming a continuation of a bowsprit. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: jibboom (Thesaurus) jibba jib crane Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language