Rubber english. Learn more. An elastic material prepared from the milky sap of certain tropical plants, especially the rubber tree, and used after processing in a great variety of products, including electric insulation and tires. RUBBER definition: 1. : natural or synthetic rubber modified by chemical treatment to increase its useful properties (such as toughness and resistance to wear) and used especially in tires, electrical insulation, and waterproof materials Sep 12, 2025 ยท Colloquially, a check that has insufficient funds to cover it is said to "bounce"; consequently, a check that will immediately bounce is referred to as "rubber" or a "rubber check. an elastic substance (= that stretches) made either from the juice of particular tropical trees…. [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 chemicals. " Rubber is a strong, waterproof, elastic substance made from the juice of a tropical tree or produced chemically. . Rubber definition: a highly elastic solid substance, light cream or dark amber in color, polymerized by the drying and coagulation of the latex or milky juice of rubber trees and plants, especially Hevea and Ficus species. It is used for making tires, boots, and other products. Definition of rubber noun from the Oxford Advanced Learner's Dictionary. My legs were like rubber - I could hardly walk. lojc wulmqhu xbzu lldklry rgfbx pyqpci szuc aqby fvcwv dtdqibe