A Polyomino board is a grid of squares that need to be covered by Polyomino puzzle pieces. It is possible for some parts of the grid to be blocked off.

A Polyomino is a puzzle piece composed of a number equally sized grid-squares. Depending on the number of squares they can go by different names.

A polyomino puzzle consists of a board and a set of polyomino pieces to be placed onto the board. The puzzle is considered solved when all pieces have been placed.