| Noun | 1. | imaum - (Islam) the man who leads prayers in a mosque; for Shiites an imam is a recognized authority on Islamic theology and law and a spiritual guideIslam, Mohammedanism, Muhammadanism, Muslimism, Islamism - the monotheistic religion of Muslims founded in Arabia in the 7th century and based on the teachings of Muhammad as laid down in the Koran; "the term Muhammadanism is offensive to Muslims who believe that Allah, not Muhammad, founded their religion" leader - a person who rules or guides or inspires others | |