/ Dictionary / Index P Pillars of Hercules: Meaning and Definition of Find definitions for: Pil'lars of Her'cules Pronunciation: [key] the two promontories on either side of the eastern end of the Strait of Gibraltar: the Rock of Gibraltar in Europe and the Jebel Musa in Africa; fabled to have been raised by Hercules. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pillaret Pillars of Islam 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