sump pump

sump pump (plural sump pumps)

1. A pump used for the removal of liquid from a sump or sump pit.
   • 2019 September 17, Edward Snowden, Permanent Record, New York, N.Y.: Metropolitan Books/Henry Holt and Company, →ISBN, page 15:

     Basements tend to flood, and ours, certainly, was perennially damp, despite the constant workings of the dehumidifier and sump pump.