noun (n)

• model of excellence or perfection of a kind; one having no equal(noun.person)

  Synonym:
  apotheosis, ideal, nonpareil, nonsuch, paragon, saint
  

  source: wordnet30
• A person or thing of a sort that there is no other such; something extraordinary; a thing that has not its equal. It is given as a name to various objects, as to a choice variety of apple, a species of medic (Medicago lupulina), a variety of pottery clay, etc.(noun)

  source: webster1913