actuator

noun

ac·​tu·​a·​tor ˈak-chə-ˌwā-tər How to pronounce actuator (audio)
-shə-
Synonyms of actuatornext
: one that actuates
specifically : a mechanical device for moving or controlling something

Examples of actuator 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.
For space robots, Ono describes simplicity in terms of the number of actuators. — IEEE Spectrum, 3 Sep. 2026 Mitchell developed the system by repurposing a six-axis industrial arm with a custom launcher, shuttlecock magazine, pneumatic actuators, and high-speed spinning wheels. — Jijo Malayil, Interesting Engineering, 1 Sep. 2026 Such systems still rely on actuators driven by electricity to apply that force. — ArsTechnica, 1 Sep. 2026 Beijing, however, holds counter-leverage through its dominance of the rare earths used in humanoid actuators and motors, Wang said. — Anniek Bao, CNBC, 26 Aug. 2026 See All Example Sentences for actuator

Word History

Etymology

actuate + -or entry 1

First Known Use

1652, in the meaning defined above

Time Traveler
The first known use of actuator was in 1652

Rhymes for actuator

See All Rhymes for actuator

Browse Nearby Words

actuation
actuator
act up
See all Nearby Words

Cite this Entry

“Actuator.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/actuator. Accessed 4 Sep. 2026.

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