appreciation

an increase in price or value; "an appreciation of 30% in the value of real estate"
a favorable judgment; "a small token in admiration of your works"
delicate discrimination (especially of aesthetic values); "arrogance and lack of taste contributed to his rapid success"; "to ask at that particular time was the ultimate in bad taste"
understanding of the nature or meaning or quality or magnitude of something; "he has a good grasp of accounting practices"
an expression of gratitude; "he expressed his appreciation in a short note"