The act of a man forcing a woman to have sexual intercourse against her will. The Bible records two clear examples in the Old Testament:
Shechem the son of Hamor, a Hivite, raped Dinah (see Genesis 34:2–7)
The son of King David, Amnon, raped his sister Tamar (2 Samuel 13:14)
In both examples, the brothers of the women took revenge for the rape of their sister.