Mental health

• Depression (mood), a state of low mood and aversion to activity

• Mood disorders characterized by depression are commonly referred to as simply depression, including: Dysthymia Major depressive disorder

Biology

• Depression (kinesiology), an anatomical term of motion, refers to downward movement, the opposite of elevation

• Depression (physiology), a reduction in a biological variable or the function of an organ

• Central nervous system depression, physiological depression^[2] of the central nervous system that can result in loss of consciousness

Earth science

• Depression (geology), a landform sunken or depressed below the surrounding area

• Depression (weather), an area of low atmospheric pressure characterized by rain and unstable weather

Economics

• Depression (economics), a sustained, long-term downturn in economic activity in one or more economies Great Depression, a severe economic depression during the 1930s, commonly referred to as simply the depression Long Depression, an economic depression during 1873–96, known at the time as the Great Depression