Rubber has several uses including:

• The material rubber, originally from the rubber tree
• The rubbery domain of polymers
• A rubber in contract bridge is two 100-point games
• In baseball the rubber is the thin white slab on the pitcher's mound from which the pitcher throws, or at times the pitcher's mound in general
• A rubber is a slang term for a condom
• The British call a rubber what Americans call an eraser