depression in WordNet English dictionary

1. a state of depression and anhedonia so severe as to require clinical intervention
   depressive disorder  clinical depression  depression 
   
2. pushing down
   "depression of the space bar on the typewriter"
   depression 
   
3. sad feelings of gloom and inadequacy
   depression 
   
4. a sunken or depressed geological formation
   natural depression  depression 
   
5. angular distance below the horizon (especially of a celestial object)
   depression 
   
6. a concavity in a surface produced by pressing
   "he left the impression of his fingers in the soft mud"
   depression  impression  imprint 
   
7. a mental state characterized by a pessimistic sense of inadequacy and a despondent lack of activity
   depression 
   
8. an air mass of lower pressure; often brings precipitation
   "a low moved in over night bringing sleet and snow"
   low  depression 
   
9. a long-term economic state characterized by unemployment and low prices and low levels of trade and investment
   depression  slump  economic crisis