[noun] [U]Deflation is a reduction of the supply of money in an economy, and therefore a reduction of economic activity, which is often part of an intentional government plan to reduce prices.Compare inflation at inflate (MAKE LARGER); reflation at reflate.Deflation can also mean a reduction (in value).There has been a deflation in/of property values.
DEFLATION
Meaning of DEFLATION in English
Cambridge English vocab. Кембриджский английский словарь. 2012