Clinical Depression , a medical condition identified by clusters of symptoms such as markedly-decreased mood, motivation, interest, energy levels, etc.
Depression (mood) , an everyday term for a sad or low mood or the loss of pleasure.
Depression (economics) , used to describe a longer-lasting and more severe economic downturn than recession.
The Great Depression , a severe economic recession in the 1930s.
Depression (meteorology) , an area of low atmospheric pressure associated with cyclones and weather fronts.
Depression (physiology) , a lowering, in particular a reduction in a particular biological variable or the function of an organ, contrasted to ''elevation''.
