Arm Definition

ärm
armed, arming, arms
noun
arms
An upper limb of the human body.
Webster's New World
In anatomy, the part of the upper limb between the shoulder and the elbow.
Webster's New World
Something, such as a sleeve on a garment or a support on a chair, that is designed to cover or support the human arm.
American Heritage
In nontechnical use, the part of the upper limb between the shoulder and the wrist.
Webster's New World
A relatively narrow extension jutting out from a large mass.
An arm of the sea.
American Heritage
Antonyms:
verb
armed, arming, arms
To supply or equip oneself with weaponry.
American Heritage
To provide with weapons, tools, etc.
Webster's New World
To equip oneself with weapons, as in preparing for war.
Webster's New World
To prepare oneself for warfare or conflict.
American Heritage
To provide with something that protects or fortifies.
Webster's New World
Antonyms:
abbreviation
Adjustable-rate mortgage.
Webster's New World
Armenia.
American Heritage
Armenian.
American Heritage
Wiktionary
adjective

(UK dialectal, chiefly Scotland) Poor; lacking in riches or wealth.

Wiktionary

(UK dialectal, chiefly Scotland) To be pitied; pitiful; wretched.

Wiktionary
idiom
an arm and a leg
  • An excessively high price:

    a cruise that cost an arm and a leg.

American Heritage
arm in arm
  • With arms linked together:

    They walked across the beach arm in arm.

American Heritage
at arm's length
  • At such a distance that physical or social contact is discouraged:

    kept the newcomer at arm's length at first.

American Heritage
with open arms
  • With great cordiality and hospitality.
American Heritage
up in arms
  • Extremely upset; indignant.
American Heritage

Other Word Forms of Arm

Noun

Singular:
arm
Plural:
arms

Origin of Arm

  • From Middle English armes weapons from Old French pl. of arme weapon from Latin arma weapons ar- in Indo-European roots Verb, Middle English armen from Old French armer from Latin armāre from arma

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Middle English arm (“poor, wretched”), from Old English earm (“poor, miserable, pitiful, wretched”), from Proto-Germanic *armaz (“poor”), from Proto-Indo-European *erm- (“poor, ill”).

    From Wiktionary

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

    From Wiktionary

  • From Middle English, from Old English earm, from Proto-Germanic *armaz (“arm”), from Proto-Indo-European *arəm- (“arm”), a suffixed form of *ar- (“to fit together”).

    From Wiktionary

  • Middle English from Old English earm ar- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

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