What is "zav"

In Torah terminology, the Hebrew word zav (lit. "flow") is a state of ritual impurity arising from abnormal seminal discharge from the male sexual organ. Purification requirements for the zav include counting seven days without seminal discharge, immersion in a spring, and bringing certain korbanot (sacrifices).

In the realm of tumah and taharah law, the zav has the ability to create a midras and is required to abstain from entering specific areas of the Temple mount.