a person or thing that causes something to happen or develop more quickly
the country has been the main accelerator of global growth for a decade
a device, typically a foot pedal, which controls the speed of a vehicle's engine
he pressed the accelerator to the floor and the taxi shot forward
the bank will have its foot on the accelerator until the economy starts to recover
an apparatus for accelerating charged particles to high velocities; a particle accelerator
electron accelerators