An overpair in poker is a pocket pair that is stronger than any community card on the board. This term is commonly used in both Texas Holdem and Omaha, although in the latter, it doesn’t necessarily imply a strong hand.
Overpair Poker Example:
You have pocket aces, and the community board reads QT8 after the flop. As your pocket pair is higher than any of the three available cards on the board, your hand qualifies as an overpair.