1

arm

play
noun \ˈärm\

Definition of arm

  1. 1 :  a human upper limb; especially :  the part between the shoulder and the wrist

  2. 2 :  something like or corresponding to an arm: as a :  the forelimb of a vertebrate b :  a limb of an invertebrate animal c :  a branch or lateral shoot of a plant d :  a slender part of a structure, machine, or an instrument projecting from a main part, axis, or fulcrum e :  the end of a ship's yard; also :  the part of an anchor from the crown to the fluke — see anchor illustration f :  any of the usually two parts of a chromosome lateral to the centromere

  3. 3 :  an inlet of water (as from the sea)

  4. 4 :  a narrow extension of a larger area, mass, or group

  5. 5 :  power, might <the long arm of the law>

  6. 6 :  a support (as on a chair) for the elbow and forearm

  7. 7 :  sleeve

  8. 8 :  the ability to throw or pitch a ball well; also :  a player having such ability

  9. 9 :  a functional division of a group, organization, institution, or activity <the logistical arm of the air force>

armless

play \ˈärm-ləs\ adjective

armlike

play \-ˌlīk\ adjective

arm in arm

  1. :  with arms linked together

Origin and Etymology of arm

Middle English, from Old English earm; akin to Latin armus shoulder, Sanskrit īrma arm


First Known Use: before 12th century


2

arm

verb

Definition of arm

  1. transitive verb
  2. 1 :  to furnish or equip with weapons

  3. 2 :  to furnish with something that strengthens or protects <arming citizens with the right to vote>

  4. 3 :  to equip or ready for action or operation <arm a bomb>

  5. intransitive verb
  6. :  to prepare oneself for struggle or resistance <arm for combat>

Examples of arm in a sentence

  1. They armed the men for battle.

  2. The group of fighters was armed by a foreign government.

  3. The two countries have been arming themselves for years, but now they have agreed to disarm.

  4. We armed ourselves with the tools we would need to survive in the forest.

  5. They arm people with accurate information.

  6. arming women with the right to vote

  7. Once the bomb has been armed, we have five minutes to escape.

Origin and Etymology of arm

Middle English armen, from Anglo-French armer, from Latin armare, from arma weapons, tools; akin to Latin ars skill, Greek harmos joint, arariskein to fit


First Known Use: 12th century


3

arm

noun, often attributive

Definition of arm

  1. 1 a :  a means (as a weapon) of offense or defense; especially :  firearm b :  a combat branch (as of an army) c :  an organized branch of national defense (as the navy)

  2. 2 plural a :  the hereditary heraldic devices of a family b :  heraldic devices adopted by a government

  3. 3 plural a :  active hostilities :  warfare <a call to arms> b :  military service

up in arms

  1. :  aroused and ready to undertake a fight or conflict

Origin and Etymology of arm

Middle English armes (plural) weapons, from Anglo-French, from Latin arma


First Known Use: 13th century


Arm

abbreviation

Definition of Arm

  1. Armenian

Other Anthropology Terms


ARM

abbreviation

Definition of ARM

  1. adjustable rate mortgage



ARM Defined for English Language Learners


2

arm

verb

Definition of arm for English Language Learners

  • : to provide (yourself, a group, a country, etc.) with weapons especially in order to fight a war or battle

  • : to provide (someone) with a way of fighting, competing, or succeeding

  • : to make (a bomb, weapon, etc.) ready for use


ARM Defined for Kids

1

arm

play
noun \ˈärm\

Definition of arm for Students

  1. 1 :  a human upper limb especially between the shoulder and wrist

  2. 2 :  something like an arm in shape or position <an arm of the sea> <the arm of a chair>

  3. 3 :  sleeve 1

  4. 4 :  1power 1 <the long arm of the law>

  5. 5 :  a foreleg of a four-footed animal


2

arm

play
verb

Definition of arm for Students

armed

arming

  1. 1 :  to provide with weapons

  2. 2 :  to provide with a way of fighting, competing, or succeeding <She armed her lawyer with facts.>


3

arm

play
noun

Definition of arm for Students

  1. 1 :  weapon, firearm

  2. 2 :  a branch of an army or of the military forces

  3. 3 arms plural :  the designs on a shield or flag of a family or government

  4. 4 arms plural :  actual fighting :  warfare <a call to arms>


Medical Dictionary

arm

play
noun \ˈärm\

Medical Definition of arm

  1. 1a:  a human upper limbb:  the part of the human upper limb between the shoulder and the wrist; also :  brachium

  2. 2a:  the forelimb of a vertebrate other than a human beingb:  a limb of an invertebrate animalc:  any of the usually two parts of a chromosome lateral to the centromere

  3. 3:  a group of subjects provided a particular treatment in a clinical trial <Since this trial did not include a radiation-only treatment arm, it has been questioned whether radiation therapy alone might be as effective as sequential chemotherapy and radiation therapy in preserving the larynx.—Everett E. Vokes et al., The New England Journal of Medicine, 21 Jan. 1993>


Law Dictionary

ARM

abbreviation

Legal Definition of ARM

  1. adjustable rate mortgage



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