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.
Humanoid learns motion ROBOTIS has demonstrated the capabilities of its AI Sapiens humanoid robot, an open-source platform for physical AI powered by DYNAMIXEL-Q actuators. Jijo Malayil, Interesting Engineering, 12 June 2026 Although there have been recent developments in soft robotics that use heat, most soft robots rely on hydraulic and pneumatic systems to move fluid through their artificial muscles and actuators. New Atlas, 12 June 2026 The idea is to distribute control across three independent layers — reasoning, coordination and reflex — placing ultra-low-latency response closest to the sensors and actuators rather than in a central brain, because reflexes do not scale by making the central brain bigger. Bill Curtis, Forbes.com, 11 June 2026 This is a very complicated print with all the actuators and overhangs. Michael Lydick, PC Magazine, 10 June 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

Browse Nearby Words

Cite this Entry

“Actuator.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/actuator. Accessed 17 Jun. 2026.

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