DEPRECIATION Meaning of DEPRECIATION in English de ‧ pre ‧ ci ‧ a ‧ tion /dɪˌpriːʃiˈeɪʃ ə n/ BrE AmE noun [uncountable] a reduction in the value or price of something:the depreciation of the dollar Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012