One who fully appreciates or understands a given thing.(noun)
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Use "appreciator" in a sentence
"Sure, it is mutually understood by both the "appreciator" and the "appeciatee" that the medium only exists on a webpage, but like two kids pretending to play "tea party" it starts to become somewhat redundant in its action."
"I'd rather have a word like an "appreciator" of my music."
"This one is interesting considering I consider myself more of a fan than just an "appreciator"."