What is Set Over Set in Poker?

Set over set is a situation in which two different players both have a set (aka three-of-a-kind) in a given hand. For example, if you hold 5♦ 5♣, your opponent has 2♣ 2♥, and the board runs out 5♠ 2♠ A♥ J♥ 7♣ you’re on the winning end of a set over set situation.