'''Depression''' means feeling [[sad]] or [[melancholic]] for a long time and losing in interest in activities that are usually enjoyable.
'''Depression''' means feeling [[sad]] or [[melancholic]] for a long time and losing in interest in activities that are usually enjoyable.
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Mental health professionals call depression a [[mental illness]]. <ref> "Depression is a mental illness that can affect mood, cognition, and physiological functioning. Each year about 21 million American adults (nearly 10% of the population) suffer from depression or a related illnessRobins, L.N. & Regier, D.A. (1990). Psychiatric Disorders in America: The Epidemiologic Catchment Area Study. New York: The Free Press.</ref>.
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Mental health professionals call depression a [[mental illness]],<ref> "Depression is a mental illness that can affect mood, cognition, and physiological functioning. Each year about 21 million American adults (nearly 10% of the population) suffer from depression or a related illnessRobins, L.N. & Regier, D.A. (1990). Psychiatric Disorders in America: The Epidemiologic Catchment Area Study. New York: The Free Press.</ref> identified by the following primary [[symptom]]s: