Jebel Musa je·bel·musa uncommon noun 1. a promontory in northern Morocco opposite the Rock of Gibraltar; one of the Pillars of Hercules SynonymsJebel MusaAbilaAbyla Related words Broader terms promontory Parts MoroccoPillars of Hercules WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.