•The limb of the human body which extends from the shoulder to the hand; also, the corresponding limb of a monkey.•Anything resembling an arm•The fore limb of an animal, as of a bear.•A limb, or locomotive or prehensile organ, of an invertebrate animal.•A branch of a tree.•A slender part of an instrument or machine, projecting from a trunk, axis, or fulcrum; as, the arm of a steelyard.•The end of a yard; also, the part of an anchor which ends in the fluke.•An inlet of water from the sea.•A support for the elbow, at the side of a chair, the end of a sofa, etc.•Fig.: Power; might; strength; support; as, the secular arm; the arm of the law.•A branch of the military service; as, the cavalry arm was made efficient.•A weapon of offense or defense; an instrument of warfare; -- commonly in the pl.•To take by the arm; to take up in one's arms.•To furnish with arms or limbs.•To furnish or equip with weapons of offense or defense; as, to arm soldiers; to arm the country.•To cover or furnish with a plate, or with whatever will add strength, force, security, or efficiency; as, to arm the hit of a sword; to arm a hook in angling.•Fig.: To furnish with means of defense; to prepare for resistance; to fortify, in a moral sense.•To provide one's self with arms, weapons, or means of attack or resistance; to take arms.

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