depression
     n 1: a mental state characterized by a pessimistic sense of
          inadequacy and a despondent lack of activity [ant: {elation}]
     2: a long-term economic state characterized by unemployment and
        low prices and low levels of trade and investment [syn: {slump},
         {economic crisis}]
     3: a sunken or depressed geological formation [syn: {natural
        depression}] [ant: {natural elevation}]
     4: sad feelings of gloom and inadequacy
     5: a time period during the 1930s when there was a worldwide
        economic depression and mass unemployment [syn: {the
        Depression}, {the Great Depression}]
     6: an air mass of lower pressure; often brings precipitation;
        "a low moved in over night bringing sleet and snow" [syn:
        {low}, {low pressure}]
     7: a state of depression and anhedonia so severe as to require
        clinical intervention [syn: {depressive disorder}, {clinical
        depression}]
     8: a concavity in a surface produced by pressing; "he left the
        impression of his fingers in the soft mud" [syn: {impression},
         {imprint}]
     9: angular distance below the horizon (especially of a
        celestial object)
     10: pushing down; "depression of the space bar on the
         typewriter"
Source: WordNet® 2.0