Definition: A mental condition marked by ongoing feelings of sadness, despair, loss of energy, and difficulty dealing with normal daily life. Other symptoms of depression include feelings of worthlessness and hopelessness, loss of pleasure in activities, changes in eating or sleeping habits, and thoughts of death or suicide. Depression can affect anyone, and can be successfully treated. Depression affects 15-25% of cancer patients.
Synonyms (terms occurring on more labels are shown first): Depression, mental depression, depressions, Depressio n, D EPRESSION
More information: PubMed search and possibly Wikipedia