/ Dictionary / Index S Siple: Meaning and Definition of Find definitions for: Si•ple Pronunciation: (sī'pul), [key] a mountain in Antarctica, on the E coast of Marie Byrd Land. 15,000 ft. (4570 m). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sipid Sippar Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language