As a Noun:
1. A game such as chess, draughts, or snakes and ladders, which people play by moving small objects around on a board. English = board game.
2. A game for two people, played on a chess board. Each player has 16 pieces, including a king. The aim is to move your pieces so that your opponent's king cannot escape being taken. English = chess.
3. A game for two people, played with round pieces on a board. English = draughts. American English = checkers.
As a Verb or Adjective:
1. In a board game, to move pieces around on a board.