Definition of rubber

• n. - One who, or that which, rubs.
• n. - An instrument or thing used in rubbing, polishing, or cleaning.
• n. - A coarse file, or the rough part of a file.
• n. - A whetstone; a rubstone.
• n. - An eraser, usually made of caoutchouc.
• n. - The cushion of an electrical machine.
• n. - One who performs massage, especially in a Turkish bath.
• n. - Something that chafes or annoys; hence, something that grates on the feelings; a sarcasm; a rub.
• n. - 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.
• n. - India rubber; caoutchouc.
• n. - An overshoe made of India rubber.