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actuator

noun

ac·​tu·​a·​tor ˈak-chə-ˌwā-tər How to pronounce actuator (audio)
-shə-
: 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.
The company has claimed that its actuators are backdrivable and super-torque-transparent. Prabhat Ranjan Mishra, Interesting Engineering, 26 Nov. 2025 There are racks of arms and shelves of legs, metal gears hanging from hooks, and trays of actuators ready to be assembled. James Vincent, Harpers Magazine, 23 Nov. 2025 The researchers developed a brand-new ultrasonic actuator shaped like a flat plate. New Atlas, 22 Nov. 2025 The bioelectronic actuator used to deliver treatments is a cylindrical silicone polymer body with eight reservoirs arranged in a circle, four for electrical stimulation and four for drug delivery. Diya Dwarakanath, IEEE Spectrum, 13 Nov. 2025 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

Browse Nearby Words

Cite this Entry

“Actuator.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/actuator. Accessed 2 Dec. 2025.

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