1. (noun) rubber, natural rubber, India rubber, gum elastic, caoutchouc
an elastic material obtained from the latex sap of trees (especially trees of the genera Hevea and Ficus) that can be vulcanized and finished into a variety of products
2. (noun) rubber, synthetic rubber
any of various synthetic elastic materials whose properties resemble natural rubber
3. (noun) rubber eraser, rubber, pencil eraser
an eraser made of rubber (or of a synthetic material with properties similar to rubber); commonly mounted at one end of a pencil
4. (noun) condom, rubber, safety, safe, prophylactic
contraceptive device consisting of a sheath of thin rubber or latex that is worn over the penis during intercourse
5. (adj) arctic, galosh, golosh, rubber, gumshoe
a waterproof overshoe that protects shoes from water or snow
6. (verb) rubber, no-good
returned for lack of funds
"a rubber check"; "a no-good check"
7. (verb) rubberize, rubberise, rubber
coat or impregnate with rubber
"rubberize fabric for rain coats"
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Definition of 'rubber' 
