D defs.my
Entry 1 sense Webster, 1913

Autonomasy

· Au·to·nom·a·sy · IPA
01 n. The use of a word of common or general signification for the name of a particular thing; as, “He has gone to town,” for, “He has gone to London.”
  1. 1.
    The use of a word of common or general signification for the name of a particular thing; as, “He has gone to town,” for, “He has gone to London.”(Rhet.)