n. 25B6; noun
she ate to ease her depression : UNHAPPINESS, sadness, melancholy, melancholia, misery, sorrow, woe, gloom, despondency, low spirits, heavy heart, despair, desolation, hopelessness; upset, tearfulness; informal the dumps, the doldrums, the blues, one's black dog, a (blue) funk; Psychiatry dysthymia.
an economic depression : RECESSION, slump, decline, downturn, standstill; stagnation; Economics stagflation.
a depression in the ground : HOLLOW, indentation, dent, dint, cavity, concavity, dip, pit, hole, sinkhole, trough, crater; basin, bowl.