It is the decreasing value of an asset

Depreciation means normal wear tear in the Fixed Assets 
during the financial year.

Depreciation means decrease in the value of fixed assets 
over a period of time due to wear and tear,inadequacy of 
asset,depletion,natural calamities etc.                     
depreciation is a charge against profits.

The concept of depriciation refer to the process of 
allocating the initial of fixed assets to several years
is called as depriciation

Decreasing the value of Fixed Assets in the books is called 
depreciation and it is continues and permanent process 
decreasing  value of fixed assets due to efflux of time , 
expiration of legal rights and expand equipment in the 
organization.

depreciation is the loss in the value of asset due to tear. 
wear with the passage of time