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English definition of “depression”

depression

noun (UNHAPPINESS)    /dɪˈpreʃ.ən/
B2 [U] the state of feeling very unhappy and without hope for the future: I was overwhelmed by feelings of depression.Sadness and regret B2 [C or U] a mental illness in which a person is very unhappy and anxious (= worried and nervous) for long periods and cannot have a normal life during these periods: Tiredness, loss of appetite, and sleeping problems are all classic symptoms of depression. If you suffer from depression, it's best to get professional help. → See also clinical depressionMental and psychiatric disorders
(Definition of depression noun (UNHAPPINESS) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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