This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. one who dedicates.

n. One who dedicates; more especially, one who inscribes a book to the favor of a patron, or to one whom he desires to compliment.

n. One who dedicates; specifically, one who inscribes a book to a patron, friend, or public character.

"There was no fatal rift between dedicator and dedicatee."

dedicatee    officeholders    quitrent    exaltations    ruffianism