the religious faith of Muslims including belief in Allah as the sole deity and in Muhammad as his prophet
Islam means submission to the will of Allah (God), the supreme reality. Muslims (those who practise Islam) believe that all creatures do this naturally, and that every child is therefore born Muslim, even if he or she later follows another path. Islam is the community of those who accept that there is no God but Allah, and that Muhammad is his prophet — Dr Mel Thompson
the civilization or culture based on Islam
Islamic /izʹlamik/ adj
Islamist noun
[Arabic islām submission (to the will of God)]