arm

a human limb; technically the part of the superior limb between the shoulder and the elbow but commonly used to refer to the whole superior limb

any projection that is thought to resemble a human arm; "the arm of the record player"; "an arm of the sea"; "a branch of the sewer"

any instrument or instrumentality used in fighting or hunting; "he was licensed to carry a weapon"

the part of an armchair or sofa that supports the elbow and forearm of a seated person

a division of some larger or more complex organization; "a branch of Congress"; "botany is a branch of biology"; "the Germanic branch of Indo-European languages"

the part of a garment that is attached at the armhole and that provides a cloth covering for the arm

prepare oneself for a military confrontation; "The U.S. is girding for a conflict in the Middle East"; "troops are building up on the Iraqi border"

supply with arms; "The U.S. armed the freedom fighters in Afghanistan"