Pronunciation: (sī'nī, sī'nē-ī"),[key] —n. 1. Also called Si'nai Penin'sula. a peninsula in NE Egypt, at the N end of the Red Sea between the Gulfs of Suez and Aqaba. 230 mi. (370 km) long.
2. Mount, the mountain, in S Sinai, of uncertain identity, on which Moses received the law. Ex. 19.