Meaning of the word accelerator in English

What does accelerator mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

accelerator

US /ekˈsel.ɚ.eɪ.t̬ɚ/
UK /əkˈsel.ə.reɪ.tər/

Noun

1.

a device, especially a pedal in a vehicle, that controls the speed of an engine

Example:
She pressed the accelerator to increase speed.
The car's accelerator was stuck, causing it to speed uncontrollably.
2.

a substance used to speed up a chemical reaction or process

Example:
This chemical acts as an accelerator in the curing process.
The new catalyst serves as an effective accelerator for the reaction.