King of Jerusalem at the time of the Hebrew invasion of Palestine (Joshua 10:1,3). He led a coalition of five of the neighboring Amorite cities to resist the invasion, but the allies were defeated at Gibeon, and suffered at Beth-horon, not only from their pursuers, but also from a great hail-storm. The five allied kings took refuge in a cave at Makkedah and were imprisoned there until after the battle, when Joshua commanded that they be brought before him; whereupon they were brought out, humiliated, and put to death. The name Adoni-zedek seems to be corrupted into Adoni-bezek in Judges, 1:5-7.
According to the Midrash, the name Adoni-zedek means "Master of Zedek"—that is, "of Jerusalem," the city of righteousness (ẓedeḳ; Gen. R. 43:6).