term:

Representative

representative adj

1 : serving to represent
2 a : standing or acting for another esp. through delegated authority [an agent acting in a capacity]
b : of, based on, or constituting a government in which the people are represented by individuals chosen from among them usually by election
3 : of or relating to representation
n : one that represents another or others in a special capacity: as
a : one that represents a constituency as a member of a legislative or other governing body
;specif
: a member of the House of Representatives of the U.S. Congress or a state legislature
b : one that represents another as agent, deputy, substitute, or delegate and that usually is invested with the authority of the principal
c : one that represents or stands in the place of a deceased person
: personal representative
d : one that represents another as successor or heir
e : one named as the plaintiff or defendant in a class action to litigate on behalf of the class

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.