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Definition of appreciation for English Language Learners. : 1  a feeling of being grateful for something. : 2  an ability to understand the worth, quality, or importance of something : an ability to appreciate something. : 3  full awareness or understanding of something.
Definition-wise, the two words don't seem to differ much, but it is worthwhile to note that the definition of gratitude includes having appreciation, whereas the definition for appreciation does not require gratitude. Source: The Difference Between Gratitude and Appreciation | eHow. Written Nov 21, 2013 Â· View Upvotes.