Mu'min or Mumin (; ) is an Arabic name and Islamic term frequently referenced in the Quran, meaning "believer". Al-Mu'minun (, ; 'The Believers') is the 23rd Surah ("chapter") of the Quran.
Mu'min denotes a person who has complete submission to the will of God and has faith firmly established in his heart, i.e. a "faithful Muslim". Also, it is used as a name and one of the names of God. The opposite term of iman ("faith") is kufr ("disbelief"), and the opposite of mu'min is kafir ("disbeliever").
The Quran states:
This verse addresses the believers, exhorting them to believe, implying multiple stages of belief.
There is a difference between the terms Muslim and mu'min. The term mu'min is the preferred term used in the Quran to describe monotheistic believers.