/ Dictionary / Index S Sinai: Meaning and Definition of Find definitions for: Si•nai Pronunciation: (sī'nī, sī'nē-ī"), [key] — n. Also calleda peninsula in NE Egypt, at the N end of the Red Sea between the Gulfs of Suez and Aqaba. 230 mi. (370 km) long. the mountain, in S Sinai, of uncertain identity, on which Moses received the law. Ex. 19. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sinai (Thesaurus) Sina sinal Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language