WordNet sense 1 (an advocate who represents someone else's policy or purpose):

interpreter, spokesperson, voice

WordNet sense 2 (a member of the United States House of Representatives):

congressman, congresswoman

WordNet sense 3 (an item of information that is representative of a type):

example, illustration, instance

WordNet sense 4 (exhibiting the qualities or characteristics that identify a group or kind or category):

typical

WordNet sense 5 (serving as a visible symbol for something abstract):

symbolic

WordNet sense 6 (characterized by or advocating or based upon the principles of democracy or social equality):

democratic