Ghusl is an Arabic term to the full-body ritual purification mandatory before the performance of various rituals and prayers, for any Muslim after sexual intercourse before Friday prayer and prayers for Islamic holidays, before entering the ihram in preparation for Hajj, after having lost consciousness, and after formally converting. Sunni Muslims also perform the ablution before Salat al-Tawba "Prayer of Repentance".

Ritual purification is a ritual prescribed by a religion through which a person is considered to be freed of uncleanliness, especially prior to the worship of a deity, and ritual purity is a state of ritual cleanliness. Ritual purification may also apply to objects and places. Ritual uncleanliness is not identical with ordinary physical impurity, such as dirt stains; nevertheless, body fluids are generally considered ritually unclean.