1. sure to die sometime; pertaining to man; deadly; pertaining to or causing death قطعاً زمانی از بین می رود ، مربوط به انسان ، کشنده ، مربوط به مرگ یا باعث مرگ می شود a. We must live with the knowledge that all living creatures are mortal. b. His rash venture brought him to a mortal illness. c. The two monarchs were mortal enemies.