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English definition of “arm”

arm

noun [C]     /ɑːm/
a part of a large company or organization that is responsible for a particular activity or place: A loss on the sale of its outdoor advertising arm pre-tax profits. The German arm accounted for about 40% of materials handling. The new constitution has strengthened the legislative arm of government.
(Definition of arm noun from the Cambridge Business English Dictionary © Cambridge University Press)
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