Definition of "arm"
The portion of the upper human appendage, from the shoulder to the wrist and sometimes including the hand.
The extended portion of the upper limb, from the shoulder to the elbow.
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.
A bay or inlet off a main body of water.
Heraldic bearings or insignia.
Poor; lacking in riches or wealth.
To be pitied; pitiful; wretched.
To supply with armour or (later especially) weapons.
To prepare a tool or a weapon for action, to activate.