Definition of "depress"

depress

/dɪˈpɹɛs/

verb
third-person singular simple present depresses, present participle depressing, simple past and past participle depressed
1. To press down.
  Quotations
  As to the fireman, the sight of him at work, swinging round with his shovelful of coal and at the same moment lightly depressing his right heel and so working the pedal which causes the steam-operated firedoors to open like magic in front of the shovel, was always a pleasure.
  1947 January and February, Cecil J. Allen, “British Locomotive Practice and Performance”, in Railway Magazine, page 39
2. To make depressed, sad or bored.
3. (economics) To cause a depression or a decrease in parts of the economy.
4. To bring down or humble; to abase (pride, etc.).
5. (mathematics) To reduce (an equation) in a lower degree.