Arm

Arm

n.
  1. The limb of the human body which extends from the shoulder to the hand; also, the corresponding limb of a monkey.
  2. Anything resembling an arm (Naut)
  3. Fig.: Power; might; strength; support; as, the secular arm; the arm of the law.
    To whom is the arm of the Lord revealed?
    — Isa. lii. 1.

Phrases & Compounds
Arm's end
the end of the arm; a good distance off.
Arm's length
the length of the arm.
Arm's reach
reach of the arm; the distance the arm can reach.
To go arm in arm
to go with the arm or hand of one linked in the arm of another.
To keep at arm's length
to keep at a distance (literally or figuratively); not to allow to come into close contact or familiar intercourse.
To work at arm's length
to work disadvantageously.

Arm

n.
  1. A branch of the military service; as, the cavalry arm was made efficient. (Mil.)

Arm

v. t.

imp. & p. p. Armed; p. pr. & vb. n. Arming

  1. To take by the arm; to take up in one's arms. [Obs.]
    And make him with our pikes and partisans A grave: come, arm him.
    Arm your prize; I know you will not lose him.
  2. To furnish with arms or limbs. [R.]
    His shoulders broad and strong, Armed long and round.
  3. To furnish or equip with weapons of offense or defense; as, to arm soldiers; to arm the country.
    Abram . . . armed his trained servants.
    — Gen. xiv. 14.
  4. 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.
  5. Fig.: To furnish with means of defense; to prepare for resistance; to fortify, in a moral sense.
    Arm yourselves . . . with the same mind.
    — 1 Pet. iv. 1.

Phrases & Compounds
To arm a magnet
to fit it with an armature.

Arm

v. i.
  1. To provide one's self with arms, weapons, or means of attack or resistance; to take arms.