accelerator Syllabification: (ac·cel·er·a·tor)Pronunciation: /akˈseləˌrātər/Translate accelerator | into French | into German | into Italian | into Spanish Definition of accelerator noun something that brings about acceleration, in particular. the device, typically a pedal, that controls the speed of a vehicle’s engine. Physics an apparatus for accelerating charged particles to high velocities. a substance that speeds up a chemical process, typically the vulcanization of rubber or the curing of a plastic. accelerator in other Oxford dictionaries Definition of accelerator in the British & World English dictionary
