the religion of Muslims collectively which governs their civilization and way of life; the predominant religion of northern Africa, the Middle East, Pakistan and Indonesia

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"

An Islamic revivalist movement, often characterized by moral conservatism, literalism, and the attempt to implement Islamic values in all spheres of life.

The faith, doctrines, or religious system of the Mohammedans; Mohammedanism; Islam.

An obscure noun that seems to be derived from the above.