High Quality Content by WIKIPEDIA articles! Mohammedan (also spelled Muhammadan, Mahommedan, Mahomedan or Mahometan) is a Western term for a follower of the Islamic prophet Muhammad. As an archaic English language term, it is used as both a noun and an adjective, meaning belonging or relating to, either Muhammad or the religion, doctrines, institutions and practices that he established. The word was formerly common in western usage, but the terms Muslim and Islamic are more common today.