spillway

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English

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English Wikipedia has an article on:
Wikipedia

Etymology

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From spill +‎ way.

Noun

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spillway (plural spillways)

  1. A path designed to take away overflow safely.
    • 1993, Loren Runar Anderson, Geotechnical practice in dam rehabilitation:
      Absence of filtered undrains beneath spillways or behind walls.
    • 2023 May 31, “Feature Pictorial”, in RAIL, number 984, page 57, photo caption:
      On February 24, 319379 crosses the wrought-iron Carr Mill Viaduct with Northern's 1515 Liverpool Lime Street-Wigan North Western service, viewed from a spillway for the reservoir.