noun Pliable material derived from the sap of the rubber tree; a hydrocarbon biopolymer of isoprene.
noun Natural rubber or any of various synthetic materials with similar properties as natural rubber.
noun An eraser.
noun A condom, especially an external condom.
noun Someone or something which rubs. One who rubs down horses. One who practises massage. A coarse towel for rubbing the body. An abrasive for rubbing with: a whetstone, file, or emery cloth, etc.