A Muslim is an adherent of Islam, an Abrahamic, monotheistic religion based on the Qur'an, which Muslims consider as the verbatim word of God as revealed to prophet Muhammad. "Muslim" is the Arabic term for "one who submits to God".
Muslims believe that God is one and imcomparable. Muslims also believe that Islam is the complete and universal version of a primordial faith that was revealed at many times and places before, including through the prophets Abraham, Moses and Jesus. Muslims maintain that previous messages and revelations have been partially changed or corrupted over time, but consider the Qur'an to be both unaltered and the final revelation from God.
Most Muslims accept as a Muslim anyone who has publicly pronounced the Shahadah (declaration of faith) which states, "There is no god but Allah, and Muhammad is the messenger of God." Their religious practices include daily prayers (salat), fasting during Ramadan (sawm), almsgiving (zakat), and the pilgrimage to Mecca (hajj) at least once in a lifetime.
Their is estimated to be between 1.2 to 1.57 billion Muslims worldwide.