Mamzer n. : A person born of relations between whom marriage was forbidden by the Mosaic law; a bastard.

Example:
What is a Mamzer in Judaism? Was anyone in the Old Testament considered a Mamzer?

Taxonomy
mamzer, marriage, husband, Rabbi Yosef, evidence, Jewish Law, law, Jews, Gentile, Rabbi, authorities, relations, married woman, relationship, nickname, slave, Israeli, Biblical law.

Defination from the web:
mamzer (Hebrew: ממזר‎) is a person born of certain relationships that are forbidden to Jews. ... While the word mamzer is often translated as "bastard", unlike the colloquial usage of bastard, a child born out of wedlock or between people of ...