Dictionary definition · arm
noun
- 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"
- 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"
- the part of a garment that is attached at the armhole and that provides a cloth covering for the arm
verb
- prepare oneself for a military confrontation"The U.S. is girding for a conflict in the Middle East"
- supply with arms"The U.S. armed the freedom fighters in Afghanistan"
Source: Open English WordNet (CC BY 4.0).