(noun.) pushing down; 'depression of the space bar on the typewriter'.
(noun.) sad feelings of gloom and inadequacy.
(noun.) angular distance below the horizon (especially of a celestial object).
(noun.) a concavity in a surface produced by pressing; 'he left the impression of his fingers in the soft mud'.
(noun.) a mental state characterized by a pessimistic sense of inadequacy and a despondent lack of activity.
(noun.) a long-term economic state characterized by unemployment and low prices and low levels of trade and investment.
(noun.) a period during the 1930s when there was a worldwide economic depression and mass unemployment.
胡安编辑
整理:马文