space that is surrounded by something
a sizeable hole (usually in the ground)
soft decayed area in a tooth; progressive decay can lead to the death of a tooth
(anatomy) a natural hollow or sinus within the body
a state of depression and anhedonia so severe as to require clinical intervention
a period during the 1930s when there was a worldwide economic depression and mass unemployment
an air mass of lower pressure; often brings precipitation
a concavity in a surface produced by pressing
a long-term economic state characterized by unemployment and low prices and low levels of trade and investment
a sunken or depressed geological formation
a mental state characterized by a pessimistic sense of inadequacy and a despondent lack of activity
angular distance below the horizon (especially of a celestial object)
pushing down
sad feelings of gloom and inadequacy
