wrongfully seizing and holding (an office or powers) by force (especially the seizure of a throne or supreme authority); "a succession of generals who ruled by usurpation"
(Islam) an invisible spirit mentioned in the Koran and believed by Muslims to inhabit the earth and influence mankind by appearing in the form of humans or animals
a monotheistic system of beliefs and practices based on the Old Testament and the teachings of Jesus as embodied in the New Testament and emphasizing the role of Jesus as savior