Legal Dictionary


Legal Definition of arm

  1. Control, means of reaching (arm of the law)

Definition of arm


  • (UK) IPA: /ɑːm/, SAMPA: /A:m/
  • Rhymes: -ɑː(r)m
  • (US) IPA: /ɑɹm/, SAMPA: /Ar\m/
  • Audio (US) [?]

Etymology 1

    From Middle English < Old English earm, from Germanic *armi- or *arma-, from Proto-Indo-European *ar-mo-, a suffixed form of *ar- ("to fit together"). Cognate to Avestan (arma) and Old Persian arma.


arm (plural arms)

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

    She stood with her right arm extended and her palm forward to indicate "Stop!"

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

    The arm and forearm are parts of the upper limb in the human body.

  3. 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.

    The robot arm reached out and placed the part on the assembly line.

  4. A bay or inlet off a main body of water.

    Shelburne Bay is an arm of Lake Champlain.

Etymology 2

    Middle English < Old French arme < Latin arma ("weapons"), from Proto-Indo-European *ar-mo-, a suffixed form of *ar- ("to fit together"), hence ultimately cognate with etymology 1.


arm (plural arms)

  1. (usually used in the plural) A weapon.
  2. (in plural) heraldic bearings or insignia


to arm (third-person singular simple present arms, present participle arming, simple past and past participle armed)

  1. To supply with a weapon or weapons.
  2. To prepare a tool or a weapon for action, to activate.

    Remember to arm an alarm system.


  • Alphagram: amr
  • mar, Mar, Mar., MAR
  • MRA
  • ram, Ram, RAM
  • RMA


  1. Wiktionary. Published under the Creative Commons Attribution/Share-Alike License.


1.     blackmail
2.     AORO
3.     precedent
4.     stare decisis
5.     Miranda warning
6.     adjudication order
7.     appellant
8.     lex patriae
9.     vicarious liability
10.     culpability