arm

adj

1. Abbreviation of Armenian.

name

1. Initialism of Acorn RISC Machine or Advanced RISC Machine.
2. Initialism of Australian Republic Movement.

noun

1. Initialism of accelerated reply mail, a service of the United States Postal Service.
2. Initialism of adjustable rate mortgage.

verb

Etymology: Back-formation from arms (plural), from Middle English armes, from Old French armes, from Latin arma (“weapons”), from Proto-Indo-European *h₂er-mo-, a suffixed form of *h₂er- (“to fit together”), hence ultimately cognate with etymology 1.

1. To supply with armour or (later especially) weapons.

   “The king armed his knights with swords and shields.”

   “They were arming them with spears and shields, putting iron halfhelms on their heads, and arraying them along the inner wall, a rank of snowy sentinels. "Lord Winter has joined us with his levies," one of the sentries [said].”

2. To supply with the equipment, knowledge, authority, or other tools needed for a particular task; to furnish with capability; to equip.

   “thou getteſt no more of me. For I am ſure thy Office doth not arme thee with ſuch authoritie.”

   “arm yourselves likewise with the same mind: for he that hath suffered in the flesh hath ceased from sin;”

3. To prepare (a tool, weapon, or system) for action; to activate.

   “Remember to arm the alarm system before leaving for work.”

4. To become prepared for action; to activate.

   “Torpedoes were loosed, but the range was too short for them to actually arm, and they bounced harmlessly off the ship as it cut loose with its secondary and antiaircraft guns, smashing anything that it could see.”

5. To cover or furnish with a plate, or with whatever will add strength, force, security, or efficiency.

   “to arm the hilt of a sword; to arm a hook in angling”

6. To take up weapons; to arm oneself.

   “The sergeant sent out an order to arm the team for the next mission.”

   “Are you arming, comrade Atheists? Are you arming for the fray?”

7. To fit (a magnet) with an armature.