The definition of appreciation is growth in the price or worth of something.(noun)
If a house costs more today that it did 10 years ago, that is an example of the appreciation of the house.
The definition of appreciation refers to the recognition or admiration of something.(noun)
Holding something in high regard, like a work of art, is an example of having an appreciation of it.
Appreciation is defined as feelings of thankfulness.(noun)
Receiving an award from a charity for your work is an example of receiving an award as appreciation of your work.
See appreciation in Webster's New World College Dictionary
See appreciation in American Heritage Dictionary 4
Learn more about appreciation