accelerator

noun

ac·​cel·​er·​a·​tor ik-ˈse-lə-ˌrā-tər How to pronounce accelerator (audio)
ak-
plural accelerators
: one that accelerates: such as
a
: a muscle or nerve that speeds the performance of an action
b
: a device (such as a gas pedal) for increasing the speed of a motor vehicle engine
c
: a substance that speeds a chemical reaction
d
: an apparatus for imparting high velocities to charged particles (such as electrons)
e
: an item of computer hardware that increases the speed at which a program or function operates
a graphics accelerator

Examples of accelerator in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Take your foot off the accelerator and let your speed drop gradually. Southern California Weather Report, Oc Register, 24 May 2025 Add an Accelerator Compost starters and accelerators can be added to new or established compost piles to jumpstart composting and help compost break down faster and in a less-smelly way. Lauren Landers, Better Homes & Gardens, 23 May 2025 This would give the card 64 compute units, 4,096 stream processors, and 128 AI accelerators. Michael Justin Allen Sexton, PC Magazine, 21 May 2025 Combined, their work has helped define Eintracht as one of the best accelerators of talent in the world. Sebastian Stafford-Bloor, New York Times, 20 May 2025 See All Example Sentences for accelerator

Word History

Etymology

accelerate + -or entry 1

First Known Use

1611, in the meaning defined above

Time Traveler
The first known use of accelerator was in 1611

Cite this Entry

“Accelerator.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/accelerator. Accessed 1 Jun. 2025.

Kids Definition

accelerator

noun
ac·​cel·​er·​a·​tor ik-ˈsel-ə-ˌrāt-ər How to pronounce accelerator (audio)
ak-
1
: one that accelerates
2
: a device (as a pedal) in a motor vehicle used to control the speed of the motor
3
: a device that is used to give high velocities to charged particles (as electrons and protons)

Medical Definition

accelerator

noun
ac·​cel·​er·​a·​tor ik-ˈsel-ə-ˌrāt-ər, ak- How to pronounce accelerator (audio)
: one that accelerates: as
a
: a muscle or nerve that speeds the performance of an action
a cardiac accelerator
b
: a substance that speeds a chemical reaction
c
: an apparatus for imparting high velocities to charged particles (as electrons)

More from Merriam-Webster on accelerator

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