Definition of arm:

• A weapon of offense or defense; an instrument of warfare; -- commonly in the pl.
• used to denote power ( Psalms 10:15 ; Ezekiel 30:21 ; Jeremiah 48:25 ). It is also used of the omnipotence of God ( Exodus 15:16 ; Psalms 89:13 ; 98:1 ; 77:15 ; Isaiah 53:1 ; John 12:38 ; Acts 13:17 )
• the expression that states a transaction was open and above board and did not result from some sort of inside deal or manipulation.
• To provide with arms or armor; equip; fortify; have or take arms.
• 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 equip with weapons of offense or defense.
• To furnish with arms or weapons: to fortify.
• To provide one's self with arms, weapons, or means of attack or resistance; to take arms.
• To fit oneself with weapons, or means of defense.
• To take arms.
• To furnish with arms, or means of defence, or anything requisite to fortify.
• To furnish with arms; to take up arms.
• the part of an armchair or sofa that supports the elbow and forearm of a seated person
• any projection that is thought to resemble an arm; " the arm of the record player"; " an arm of the sea"; " a branch of the sewer"
• instrument used in fighting or hunting; " he was licensed to carry a weapon"
• 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"; " troops are building up on the Iraqui border"
• 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.
• 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.
• See adjustable rate mortgage.
• A weapon of offense or defense; an instrument of warfare; - commonly in the pl.
• The limb of the human body which extends from the shoulder to the hand; any projecting part of a main body, as the side- piece of a chair, an inlet of the sea; a weapon.
• The upper extremity; specifically the segment of the upper extremity between the shoulder and the elbow, the upper arm.
• Limb extending from shoulder to wrist.
• The limb extending from the shoulder to the hand: anything projecting from the main body, as an inlet of the sea: ( fig.) power.
• ARMFUL.
• A weapon: a branch of the military service.
• A limb of the body; anything which projects.
• The upper limb of the human body; an arm- like part or branch.
• A branch of the military service.
• The limb of the human body which extends from the shoulder to the hand; any branch, such as of a sea, a tree, a machine, or a service; power or might.
• A limb of a body; a branch of a tree; inlet of the sea.
• ARMLESS.

Usage examples for arm

1. De Spain's left arm shot out.  Nan of Music Mountain by Frank H. Spearman

2. Arm isn't long enough.  Winter Fun by William O. Stoddard

3. He took it under his arm.  Adventures In Contentment by David Grayson AKA: Ray Stannard Baker

4. Hunterleys was sitting upon the arm of an easy- chair.  Mr. Grex of Monte Carlo by E. Phillips Oppenheim