Mental Health & Substance Use

Major depressive disorder

Also called: MDD

What does Major depressive disorder mean?

A clinical depressive illness meeting defined criteria for severity, duration and functional impact.

U.S. National Library of Medicine
Understanding Medical Words ↗ National Cancer Institute
Cancer Terms Dictionary ↗ CDC
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This is a plain-language Healthway explanation, not an individual diagnosis. The meaning of a term can change with the clinical context in which it appears.