1[uncountable, countable, usually plural]a light strong material that is produced by chemical processes and can be formed into shapes when heated. There are many different types of plastic, used to make different objects and fabricsThe pipes should be made of plastic.a sheet of clear plasticthe plastic industry2plastics[uncountable]the science of making plastics3[uncountable] (informal) a way of talking about credit cardsDo they take plastic?