one who, or that which, rubs.-an instrument or thing used in rubbing, polishing, or cleaning.-a coarse file, or the rough part of a file.-a whetstone; a rubstone.-an eraser, usually made of caoutchouc.-the cushion of an electrical machine.-one who performs massage, especially in a turkish bath.-something that chafes or annoys; hence, something that grates on the feelings; a sarcasm; a rub.-in some games, as whist, the odd game, as the third or the fifth, when there is a tie between the players; as, to play the rubber; also, a contest determined by the winning of two out of three games; as, to play a rubber of whist.-india rubber; caoutchouc.-an overshoe made of india rubber.