Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “accelerator”

accelerator

noun [C]  /ɪkˈsel·əˌreɪt̬·ər, æk-/ us  

accelerator noun [C] (CHEMICAL)

chemistry a substance that is added to other substances to speed up a chemical reaction

accelerator noun [C] (SOMETHING THAT INCREASES RATE)

physics (also particle accelerator) a device used to accelerate very small pieces of nuclear material for scientific experiments

accelerator noun [C] (THING THAT MAKES SOMETHING GO FASTER)

a pedal (= part worked with the foot) in a car that makes the car go faster when pressed
(Definition of accelerator from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of accelerator?
Add Cambridge dictionaries to your browser to your website

Definitions of “accelerator” in other dictionaries

Word of the Day

throw

to send something through the air with force, especially by a sudden movement of the arm

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More