In Jewish religious law, ṭum'ah and ṭaharah are the state of being ritually "impure" and "pure", respectively. The Hebrew noun ṭum'ah, meaning "impurity", describes a state of ritual impurity. A person or object which contracts ṭum'ah is said to be ṭamé, and thereby unsuited for certain holy activities and uses until undergoing predefined purification actions that usually include the elapse of a specified time-period.

Mikveh or mikvah is a bath used for the purpose of ritual immersion in Judaism to achieve ritual purity.