| Noun | 1. | Sinai - a mountain peak in the southern Sinai Peninsula (7,500 feet high); it is believed to be the peak on which Moses received the Ten CommandmentsSynonyms: Mount Sinai |
| 2. | Sinai - a desert on the Sinai Peninsula in northeastern Egypt Synonyms: Sinai Desert | |
| 3. | Sinai - a peninsula in northeastern Egypt; at north end of Red Sea Synonyms: Sinai Peninsula |