A title which means  ‘Commander of the Faithful.’

Although it has been used throughout Islamic history by caliphs to signify their claim to authority and continues to be used today in much of the Arab world to denote their kings and political leaders of their state, in Shi’āh thought, this title is reserved only for the 1st Imām, ʿAlī ibn Abi Tālib (ʿa). It cannot be used even for any of the other eleven Imāms which came after him.