What does "arms" mean?

Additional senses

1. 2.(Law) Anything which a man takes in his hand in anger, to strike or assault another with; an aggressive weapon. Cowell. Blackstone.
2. 3.(Her.) The ensigns armorial of a family, consisting of figures and colors borne in shields, banners, etc., as marks of dignity and distinction, and descending from father to son.
3. 4.(Falconry) The legs of a hawk from the thigh to the foot. Halliwell. Bred to arms, educated to the profession of a soldier. -- In arms, armed for war; in a state of hostility. -- Small arms, portable firearms known as muskets, rifles, carbines, pistols, etc. -- A stand of arms, a complete set for one soldier, as a musket, bayonet, cartridge box and belt; frequently, the musket and bayonet alone. -- To arms! a summons to war or battle. -- Under arms, armed and equipped and in readiness for battle, or for a military parade. Arm's end, Arm's length, Arm's reach. See under Arm.