■ noun
1》 severe despondency and dejection, especially when long-lasting.
↘(also clinical ~ ) Medicine a mental condition characterized by severe feelings of hopelessness and inadequacy.
2》 a long and severe recession in an economy or market.
↘( the Depression or the Great Depression ) the financial and industrial slump of 1929 and subsequent years.
3》 the action of depressing something.
↘a sunken place or hollow.
4》 Meteorology a cyclonic weather system.
Origin
ME: from L. depressio(n-) , from deprimere (see depress ).