What is "zavah"

The Hebrew term zavah (Hebrew זבה) is a state of ritual impurity applicable to females arising from vaginal blood discharges not during the usually anticipated menstrual cycle.

In the realm of tumah and taharah, the zavah has the ability to create a midras, (, , and to make unclean for a seven-day period - a man who conducts sexual intercourse with her. Additionally, the zavah woman and her partner are liable to kareth for willfully engaging in forbidden sexual intercourse.