A board is a plank or surface, sometimes having buttons or controls. You can cut vegetables on a cutting board, post a flyer on a bulletin board, or cause a power outage on a circuit board.
The word board frequently finds itself as half of a compound word where the action takes place: You stand on a surfboard, type at a keyboard, or lose on a checkerboard. You can also sit on a board, meaning a team, of directors, or board, meaning stay, at a hotel. If you want to leave your hotel, you may board, or climb onto, your hovercraft. Remember: Being stiff as a board is not the same as being bored stiff.