depreciation-n; 3 Senses

Sense Number 1: a decrease in the value of something, e.g., currency

Commentary: DEPRECIATION[+event][+decrease][+value][+monetary][+currency/+property]
NOTE: refers to a loss of exchange value in the market.
NOTE: does not refer to an accounting deduction (Sense 2)

Currency traders are not expecting another major depreciation of the dollar.
It's a good time to travel there, given the recent depreciation of their currency.
The depreciation of property values in this town was due to the pollution scare.

WordNet 3.0 Sense Numbers: 1

Sense Number 2: accounting deduction, decreased worth of an asset over time due to use or obsolescence

Commentary: DEPRECIATION[+process][+accounting][+deduction][+worth][+asset][+used] [+quantity][+amount][+expense][-cash]
NOTE: refers to expenses on a balance sheet which are the assumed loss of value over time of a used or obsolescent asset.

The usual rate of depreciation for a personal computer is about 20 percent a year.
Our accountant factored in depreciation charges for manufacturing equipment.
You can amortize the expense of this high-end laser if you consider the depreciation allowance.

WordNet 3.0 Sense Numbers: 2

Sense Number 3: disparagement or belittlement of something

Commentary: DEPRECIATION[+action][+communication][+disparagement]
NOTE: implies an agent communicating a belittling message.

John's depreciation of our efforts was disheartening.
Mary's energetic presentation was met with depreciation from the client.

WordNet 3.0 Sense Numbers: 3