Definition of Arm

1. Noun. 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.

2. Verb. Prepare oneself for a military confrontation. "Troops are building up on the Iraqi border"
Exact synonyms: Build Up, Fortify, Gird
Specialized synonyms: Re-arm, Rearm, Forearm
Derivative terms: Armament, Armor, Fort, Fortification
Antonyms: Disarm

3. Noun. Any projection that is thought to resemble a human arm. "A branch of the sewer"
Exact synonyms: Branch, Limb
Generic synonyms: Projection

4. Verb. Supply with arms. "The U.S. armed the freedom fighters in Afghanistan"
Generic synonyms: Furnish, Provide, Render, Supply
Specialized synonyms: Munition, Rearm
Derivative terms: Armament

5. Noun. Any instrument or instrumentality used in fighting or hunting. "He was licensed to carry a weapon"

6. Noun. The part of an armchair or sofa that supports the elbow and forearm of a seated person.
Group relationships: Armchair
Generic synonyms: Armrest
Specialized synonyms: Writing Arm

7. Noun. A division of some larger or more complex organization. "The Germanic branch of Indo-European languages"

8. Noun. The part of a garment that is attached at the armhole and that provides a cloth covering for the arm.
Exact synonyms: Sleeve
Generic synonyms: Cloth Covering
Terms within: Cuff, Turnup, Elbow, Wristband
Specialized synonyms: Dolman Sleeve, Long Sleeve, Raglan Sleeve, Shirtsleeve, Short Sleeve
Group relationships: Garment

Definition of Arm

1. n. The limb of the human body which extends from the shoulder to the hand; also, the corresponding limb of a monkey.

2. n. A branch of the military service; as, the cavalry arm was made efficient.

3. v. t. To take by the arm; to take up in one's arms.

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

Definition of Arm

1. Initialism. accelerated reply mail: a service of the United States Postal Service ¹

2. Initialism. adjustable rate mortgage ¹

3. Initialism. Acorn Risc Machine ¹

4. Abbreviation. Armenian ¹

5. Noun. The portion of the upper human appendage, from the shoulder to the wrist and sometimes including the hand. ¹

6. Noun. (anatomy) The extended portion of the upper limb, from the shoulder to the elbow. ¹

7. Noun. A long, narrow, more or less rigid part of an object extending from the main part or centre of the object, such as the arm of an armchair, a crane, a pair of spectacles or a pair of compasses. ¹

8. Noun. A bay or inlet off a main body of water. ¹

9. Adjective. (context: UK dialectal chiefly Scotland) Poor; lacking in riches or wealth. ¹

10. Adjective. (context: UK dialectal chiefly Scotland) To be pitied; pitiful; wretched. ¹

11. Noun. (context: usually used in the plural) A weapon. ¹

12. Noun. (context: in the plural) heraldic bearings or insignia ¹

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

14. Verb. To prepare a tool or a weapon for action, to activate. ¹

¹ Source:

Definition of Arm

1. to supply with weapons [v -ED, -ING, -S]

Medical Definition of Arm

1. 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; as, 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. The end of a yard; also, the part of an anchor which ends in the fluke. An inlet of water from the sea. A support for the elbow, at the side of a chair, the end of a sofa, etc. 3. 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) 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 (or walk) arm in arm, to go with the arm or hand of one linked in the arm of another. "When arm in armwe went along." . 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. Origin: AS. Arm, earm; akin to OHG. Aram, G, D, Dan, & Sw. Arm, Icel. Armr, Goth. Arms, L. Armus arm, shoulder, and prob. To Gr. Joining, joint, shoulder, fr. The root to join, to fit together; cf. Slav. Rame. See Art, Article. 1. To take by the arm; to take up in one's arms. "And make him with our pikes and partisans A grave: come, arm him." (Shak) "Arm your prize; I know you will not lose him." (Two N. Kins) 2. To furnish with arms or limbs. "His shoulders broad and strong, Armed long and round." (Beau. & Fl) 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. 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) To arm a magnet, to fit it with an armature. Origin: OE. Armen, F. Armer, fr. L. Armare, fr. Arma, pl, arms. See arms. Source: Websters Dictionary (01 Mar 1998)

Lexicographical Neighbors of Arm

arm's length
arm's reach
arm and a leg
arm band
arm bone
arm exercise
arm guard
arm hair

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