ETYM Cf. French appréciation.
1. An expression of gratitude.
2. An increase in price or value over time.
3. Understanding of the nature or meaning or quality or magnitude of something; SYN. grasp, hold.

Warm friendly feelings of gratitude; SYN. thankfulness, appreciativeness.

ETYM French gratitude, Late Lat. gratitudo, from gratus agreeable, grateful. Related to Grate.
A feeling of thankfulness and appreciation.