1 [uncountable] a strong substance that can be stretched and does not allow liquids to pass through it, used for making tyres, boots, etc. It is made from the liquid (= sap ) inside a tropical plant or is produced using chemicalsa ball made of rubbera rubber tree see also foam rubber, India rubber2 [countable] (British English) (also eraser North American English, British English) a small piece of rubber or a similar substance, used for removing pencil marks from paper; a piece of soft material used for removing chalk marks from a blackboard3 [countable] (old-fashioned, informal, especially North American English) = condom4 [countable] (in some card games or sports) a competition consisting of a series of games or matches between the same teams or playersIdioms


ˈrʌbə(r)
ˈrʌbər