ro·​ta·​tor | \ ˈrō-ˌtā-tər How to pronounce rotator (audio) also rō-ˈtā- \

Definition of rotator

: one that rotates or causes rotation especially plural rotators or rotatores\ ˌrō-​tə-​ˈtȯr-​ˌēz How to pronounce rotatores (audio) \ : a muscle that partially rotates a part on its axis

Examples of rotator in a Sentence

Recent Examples on the Web The Giants are hoping Jeff Samardzija (rotator-cuff inflammation) can begin a throwing program Wednesday. Henry Schulman,, "Giants add Duggar to provide much-needed boost to outfield defense," 17 Aug. 2020 This Grillart tool has five brushes in one and a 360-degree rotator. Matt Haines, CNN Underscored, "Everything you need to grill up a perfectly seared steak," 30 July 2020 After an estimated 20 minute charging time, the Fairy Doll can remain in the air for 6-8 minutes, powered by her flexible skirt/rotator blades. Popular Science, "Flying toys that will enthrall your kids," 15 Jan. 2020 Gluons, the eight particles that convey the strong force, can be thought of as the rotators of the triangles. Quanta Magazine, "Grand Unification Dream Kept at Bay," 15 Dec. 2016 Harper says there are a few factors that can lead to this poor positioning, but the most likely culprit is lack of flexibility in the upper and middle spine (called the thoracic spine) and internal rotator muscles of the shoulders. Amy Marturana, SELF, "Here’s Why Your Neck and Shoulders Sometimes Hurt After a Run," 8 Sep. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'rotator.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of rotator

1659, in the meaning defined above

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The first known use of rotator was in 1659

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Cite this Entry

“Rotator.” Dictionary, Merriam-Webster, Accessed 4 Dec. 2020.

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More Definitions for rotator


ro·​ta·​tor | \ ˈrō-ˌtāt-ər also rō-ˈ \
plural rotators or rotatores\ ˌrōt-​ə-​ˈtōr-​ēz How to pronounce rotatores (audio) \

Medical Definition of rotator

: a muscle that partially rotates a part on its axis specifically : any of several small muscles in the dorsal region of the spine arising from the upper and back part of a transverse process and inserted into the lamina of the vertebra above

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