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English definition of “arm”

arm

noun [C]     /ɑːm/
BODY PART A1 the long part at each side of the human body, ending in a hand: She held the tiny baby in her arms. He put his arms around her. She was standing with her arms folded (= with one arm crossed over the other). The arm
arm in arm with your arm gently supporting or being supported by someone else's arm: They walked through the park, arm in arm.Having in your hands
CLOTHES the part of a piece of clothing that you put your arm inParts of clothes
CHAIR the part of a chair where your arm restsChairs and seats
→ See also arms, twist sb's arm
(Definition of arm noun from the Cambridge Learner's Dictionary © Cambridge University Press)

Definitions of “arm” in other dictionaries

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