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.
By controlling the pressure inside the robot’s body and the temperature of the actuators, the researchers were able to steer it through intricate paths. Neetika Walter, Interesting Engineering, 16 Oct. 2025 The Cleveland County facility produces advanced valves, actuators, clutches, and controls for automotive, truck and off-road vehicles. Charlotte Observer, 6 Oct. 2025 Its high-response linear actuator (HLA) focus motor snaps between near and far-off subjects in an instant, even with the a7R IV's autofocus system, which isn't as speedy as more recent Sony and L-mount cameras. PC Magazine, 9 Sep. 2025 The researchers fabricated the actuators using a 2D molding process that can manufacture them at millimeter, centimeter, and decimeter scales. IEEE Spectrum, 12 Aug. 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

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Cite this Entry

“Actuator.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/actuator. Accessed 18 Oct. 2025.

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