1. God; Jesus Christ. Often capitalized when used with this meaning. The man said that he was guided by a vision of the King of Kings, who came to him as he knelt in prayer by his bed.

2. A king who oversees the entirety of a territory ruled by a number of lesser kings. The death of the monarch was the death of the last king of kings the region ever saw.

3. A man who is particularly respected or revered by others. The football star was known as the king of kings in his hometown.