MDD (Major Depressive Disorder)

Definition

Major depressive disorder (MDD) is a mental health disorder characterized by persistently depressed mood or loss of interest in activities causing significant impairment in daily life.

Related terms

Dysthymia: Persistent mild depression lasting for at least two years.

Seasonal Affective Disorder (SAD):

Depression associated with late autumn and winter thought to be caused by lack of light.

Postpartum Depression: Moderate to severe depression experienced by women after giving birth.