D defs.my
Entry 1 sense Webster, 1913

Antonomasia

· An·to·no·ma·si·a · IPA /ˌæntənəˈmeɪʒə/
01 n. The use of some epithet or the name of some office, dignity, or the like, instead of the proper name of the person; as when his majesty is …
  1. 1.
    The use of some epithet or the name of some office, dignity, or the like, instead of the proper name of the person; as when his majesty is used for a king, or when, instead of Aristotle, we say, the philosopher; or, conversely, the use of a proper name instead of an appellative, as when a wise man is called a Solomon, or an eminent orator a Cicero.(Rhet.)