Array and Arm

array

An orderly arrangement.
- usage: "an array of troops in battle order"
An impressive display.
- usage: "it was a bewildering array of books"; "his tools were in an orderly array on the basement wall"
Especially fine or decorative clothing.
- synonyms: raiment, regalia
An arrangement of aerials spaced to give desired directional characteristics.

Lay out orderly or logically in a line or as if in a line.
- usage: "lay out the clothes"; "lay out the arguments"
- synonyms: range, lay out, set out
Align oneself with a group or a way of thinking.
- synonyms: align

(n.) Order; a regular and imposing arrangement; disposition in regular lines; hence, order of battle; as, drawn up in battle array.
(n.) To deck or dress; to adorn with dress; to cloth to envelop; -- applied especially to dress of a splendid kind.
(n.) To place or dispose in order, as troops for battle; to marshal.
(n.) The whole body of jurors summoned to attend the court.
(n.) To set in order, as a jury, for the trial of a cause; that is, to call them man by man.
(n.) A ranking or setting forth in order, by the proper officer, of a jury as impaneled in a cause.
(n.) The whole body of persons thus placed in order; an orderly collection; hence, a body of soldiers.
(n.) An imposing series of things.
(n.) Dress; garments disposed in order upon the person; rich or beautiful apparel.
(n.) The panel itself.

Webster's Revised Unabridged Dictionary

arm

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.
- usage: "the arm of the record player"; "an arm of the sea"; "a branch of the sewer"
- synonyms: branch, limb
Any instrument or instrumentality used in fighting or hunting.
- usage: "he was licensed to carry a weapon"
- synonyms: weapon, weapon system
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.
- usage: "a branch of Congress"; "botany is a branch of biology"; "the Germanic branch of Indo-European languages"
- synonyms: branch, subdivision
The part of a garment that is attached at the armhole and that provides a cloth covering for the arm.
- synonyms: sleeve

Prepare oneself for a military confrontation.
- usage: "The U. S. Is girding for a conflict in the Middle East"; "troops are building up on the Iraqi border"
- synonyms: build up, fortify, gird
Supply with arms.
- usage: "The U. S. Armed the freedom fighters in Afghanistan"

(n.) Anything resembling an arm.
(n.) A limb or locomotive or prehensile organ, of an invertebrate animal.
(v.t.) 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.
(n.) The fore limb of an animal, as of a bear.
(n.) A branch of a tree.
(n.) A branch of the military service; as, the cavalry arm was made efficient.
(n.) A weapon of offense or defense; an instrument of warfare; -- commonly in the pl.
(n.) A support for the elbow, at the side of a chair, the end of a sofa, etc.
(n.) The end of a yard; also, the part of an anchor which ends in the fluke.
(v.t.) To furnish with arms or limbs.
(v.i.) To provide one's self with arms, weapons or means of attack or resistance; to take arms.
(v.t.) Fig.: To furnish with means of defense; to prepare for resistance; to fortify, in a moral sense.
(n.) Fig.: Power; might; strength; support; as, the secular arm; the arm of the law.
(n.) An inlet of water from the sea.
(n.) A slender part of an instrument or machine, projecting from a trunk, axis or fulcrum; as, the arm of a steelyard.
(v.t.) To take by the arm; to take up in one's arms.
(n.) The limb of the human body which extends from the shoulder to the hand; also, the corresponding limb of a monkey.
(v.t.) To furnish or equip with weapons of offense or defense; as, to arm soldiers; to arm the country.

Webster's Revised Unabridged Dictionary

(Military) ARM stands for antiradiation missile

Department of Defense Dictionary of Military and Associated Terms. 31 January 2011.