de·pre·ci·a·tion 
(dĭ-prē′shē-āshən)
(dĭ-prē′shē-āshən)n.
1. A decrease or loss in value, as because of age, wear, or market conditions.
2. Accounting An allowance made for a loss in value of property.
3. Reduction in the purchasing value of money.
4. An instance of disparaging or belittlement.