Definition of depression

• n. - The act of depressing.
• n. - The state of being depressed; a sinking.
• n. - A falling in of the surface; a sinking below its true place; a cavity or hollow; as, roughness consists in little protuberances and depressions.
• n. - Humiliation; abasement, as of pride.
• n. - Dejection; despondency; lowness.
• n. - Diminution, as of trade, etc.; inactivity; dullness.
• n. - The angular distance of a celestial object below the horizon.
• n. - The operation of reducing to a lower degree; -- said of equations.
• n. - A method of operating for cataract; couching. See Couch, v. t., 8.