Definitions
1.nounThe 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.nounThe 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.nounA limb, or locomotive or prehensile organ, of an invertebrate animal."the arms of an octopus"
4.nounA 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."
5.nounA bay or inlet off a main body of water."Shelburne Bay is an arm of Lake Champlain."
6.nounA branch of an organization."the cavalry arm of the military service"
7.nounPower; might; strength; support."the arm of the law"
8.nounA pitcher"The team needs to sign another arm in the offseason."
9.nounOne of the two parts of a chromosome.
10.nounA group of patients in a medical trial.
11.verbTo take by the arm; to take up in one's arms.