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English definition of “arm”

arm

noun [C] (BODY PART)   /ɑrm/
either of the two long parts of the upper body that are joined to the shoulders and have hands at the end: Her arm was bandaged from elbow to wrist. He held his young son in his arms (= closely). The arm of a piece of clothing or furniture is a part of it that you put your arm in or on: the arm of a jacket/chair An arm of an organization is a part of it with particular responsibilities: the company's investment banking arm
(Definition of arm noun (BODY PART) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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