Meaning

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 sunken or depressed geological formation

originFrom Middle English depression, depressioun, from Old French depression, from Latin dēpressiō. Equivalent to depress + -ion.

Etymology from Wiktionary, CC BY-SA 3.0