depression

(noun) a mental state characterized by a pessimistic sense of inadequacy and a despondent lack of activity.

(noun) a long-term economic state characterized by unemployment and low prices and low levels of trade and investment. Synonyms: slump, economic crisis.

(noun) a sunken or depressed geological formation. Synonyms: natural depression.

(noun) sad feelings of gloom and inadequacy.

(noun) a period during the 1930s when there was a worldwide economic depression and mass unemployment. Synonyms: Depression, Great Depression.

(noun) an air mass of lower pressure; often brings precipitation. Synonyms: low. Examples: "A low moved in over night bringing sleet and snow."

(noun) a state of depression and anhedonia so severe as to require clinical intervention. Synonyms: depressive disorder, clinical depression.

(noun) a concavity in a surface produced by pressing. Synonyms: impression, imprint. Examples: "He left the impression of his fingers in the soft mud."

(noun) angular distance below the horizon (especially of a celestial object).

(noun) pushing down. Examples: "Depression of the space bar on the typewriter."