Member

A member is a person who belongs to a group of people. Member may also mean:

 In set theory,  an object that belongs to a set (mathematical) is an element,
 A  user that is signed up for an internet service provider (ISP) service is a member of the ISP
 Military jury, which is called "Members" by those in the military
 Limb, a part of the human or animal body
 The penis (slang)