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

prepare oneself for a military confrontation

The U.S. is girding for a conflict in the Middle East

any projection that is thought to resemble a human arm

the arm of the record player

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