Refers specifically to the rook in chess. In Japanese chess (将棋), the equivalent piece is called 飛車 (ひしゃ).
チェスでは、ルークは縦か横に何マスでも動ける。
In chess, the rook can move any number of squares vertically or horizontally.
I moved my rook and captured my opponent's pawn.
ルークでビショップを取った。
I captured the bishop with my rook.