either of the human upper limbs that extend from the shoulder, sometimes not including the hand and wrist
the forelimb of a vertebrate animal
a limb of an invertebrate animal
a support, e.g. on a chair, for the elbow and forearm
the sleeve of a garment
an inlet of water from the sea
a functional division of a group or activity, e.g. a combat branch of an army
a baby/babe in arms
a child too young to walk
arm in arm
with arms linked
at arm's length
far enough away to avoid unwanted familiarity
cost an arm and a leg
informal to be very expensive
put the arm on
NAmer, informal to try to use force on (somebody)
the long/strong arm of the law
the far-reaching might of the law or the police force
with open arms
with welcoming enthusiasm
would give one's right arm for
informal want (something) desperately
armless adj
armlike adj
[Old English earm]