Definition of arm :
1. A branch of a tree.
2. A branch of the military service; as, the cavalry arm was made efficient.
3. A limb, or locomotive or prehensile organ, of an invertebrate animal.
4. A slender part of an instrument or machine, projecting from a trunk, axis, or fulcrum; as, the arm of a steelyard.
5. A support for the elbow, at the side of a chair, the end of a sofa, etc.
6. A weapon of offense or defense; an instrument of warfare; - commonly in the pl.
7. An inlet of water from the sea.
8. Anything resembling an arm
9. Fig.: Power; might; strength; support; as, the secular arm; the arm of the law.
10. Fig.: To furnish with means of defense; to prepare for resistance; to fortify, in a moral sense.
11. The end of a yard; also, the part of an anchor which ends in the fluke.
12. The fore limb of an animal, as of a bear.
13. The limb of the human body which extends from the shoulder to the hand; also, the corresponding limb of a monkey.
14. 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.
15. To furnish or equip with weapons of offense or defense; as, to arm soldiers; to arm the country.
16. To furnish with arms or limbs.
17. To provide one's self with arms, weapons, or means of attack or resistance; to take arms.
18. To take by the arm; to take up in one's arms.
creek, strengthen, encircle, gird, forearm, beef up, branch, hook, wing, firearm, fort, spike, cylinder, part, unit, work up, department, run, appendage, rivulet, estuary, build, lace, develop, subdivision, handle, division, tributary, sleeve, outgrowth, weapon, leg, section, bay, bow, build up, progress, stream, prong, subsection, unfriendly, fin, crook, offset, extension, inlet, remote, agency, gun, girdle, haughty, projection, ramp up, away, weapon system, arms, bough, at a distance, rod, offshoot, artillery, member, limb, organ, fork, annex, brook, fortify, tree branch, assembly, ramification, bend
deputize (part of speech: verb)
deputy (part of speech: noun)
deputy, ghost, envoy, mouthpiece, backup, assignee, helpmate, attendant, assistant, spokeswoman, double, delegate, alternate, nominee, stand-in, substitute, dummy, lieutenant, acolyte, emissary, agent, representative, proxy, second, servant, figurehead, spokesman, attorney, token, surrogate, appointee, auxiliary, helper, understudy, aide
- Or your left arm? - "The World's Greatest Books, Vol III", Arthur Mee and J.A. Hammerton, Eds..
- A few hours afterwards, her head still turned on Milly's arm, Christina died. - "The Nest, The White Pagoda, The Suicide, A Forsaken Temple, Miss Jones and The Masterpiece", Anne Douglas Sedgwick.
- She put her hand on his arm and looked up into his face. - "The Prelude to Adventure", Hugh Walpole.