noun.
One who fully appreciates or understands a given thing.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a person who is fully aware of something and understands it
Word Usage
"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."