Possible Definitions:
1. Rubber (n.) One who, or that which, rubs.
2. Rubber (n.) An instrument or thing used in rubbing, polishing, or cleaning.
3. Rubber (n.) A coarse file, or the rough part of a file.
4. Rubber (n.) A whetstone; a rubstone.
5. Rubber (n.) An eraser, usually made of caoutchouc.
6. Rubber (n.) The cushion of an electrical machine.
7. Rubber (n.) One who performs massage, especially in a Turkish bath.
8. Rubber (n.) Something that chafes or annoys; hence, something that grates on the feelings; a sarcasm; a rub.
9. Rubber (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.
10. Rubber (n.) India rubber; caoutchouc.
11. Rubber (n.) An overshoe made of India rubber.