late 14c. as a term in astronomy, from Old French depression (14c.) or directly from Latin depressionem (nominative depressio), noun of action from past participle stem of deprimere "to press down, depress" (see depress).
Attested from 1650s in the literal sense; meaning "dejection, depression of spirits" is from early 15c. (as a clinical term in psychology, from 1905); meteorological sense is from 1881 (in reference to barometric pressure); meaning "a lowering or reduction in economic activity" was in use by 1826; given a specific application (with capital D-) by 1934 to the one that began worldwide in 1929. For "melancholy, depression" an Old English word was grevoushede.
1. The movie sees Burton psychoanalysing Firth to cure him of his depression.
2. Depression lowers the human ability to cope with disease.
3. Lack of exercise can lead to feelings of depression and exhaustion.
4. Depression is the third thing that works to my patients' disadvantage.
5. She continued to have severe stomach cramps, aches, fatigue, and depression.