1. recognition of the value, significance, or quality of something
2. gratitude or thankful recognition
3. understanding or awareness of the nature and quality of something

Examples

• She showed her appreciation by writing a thank-you note.
• His appreciation for classical music grew over the years.
• The teacher expressed appreciation for the students’ hard work.
• The house showed significant appreciation in value.
• I have a deep appreciation for your help during this difficult time.
• The art critic’s appreciation of the painting was evident in his review.
• Stock appreciation has benefited many investors this year.