Dry well

/ˈdɹaɪˌwɛl/ noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    An underground structure (for example, a pit filled with gravel) that disposes of unwanted water (most commonly surface runoff and stormwater and in some cases greywater) by holding it and dissipating it into the groundwater.
  2. 2
    Used other than figuratively or idiomatically: see dry, well. Any kind of well that is dry.

Etymology

From dry + well (in both open compound and solid compound form).