Synonyms for Representation (same or very similar meaning)
WordNet sense 1 (the state of serving as an official and authorized delegate or agent):
agency, delegacyWordNet sense 2 (a performance of play):
histrionics, theatrical, theatrical performanceWordNet sense 3 (a presentation to the mind in the form of an idea or image):
internal representation, mental representationFrom the ODE community, based on WordNetadd/edit