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Webster 1913 Edition

Noun.

One to whom a thing is dedicated; – correlative to

dedicator

dedicatee ‎(plural dedicatees)

Someone to whom something is dedicated
- 2009, January 11, “James Campbell”, in Howls:
  In 1949, having fallen in with some petty criminals, he was arrested for harboring stolen goods and subsequently committed to the New York State Psychiatric Institute, where he met the future dedicatee of "Howl," Carl Solomon.