Bilge n.
 1. The protuberant part of a cask, which is usually in the middle.
 2. Naut. That part of a ship's hull or bottom which is broadest and most nearly flat, and on which she would rest if aground.
 3. Bilge water.
 Bilge free Naut., stowed in such a way that the bilge is clear of everything; -- said of a cask.
 Bilge pump, a pump to draw the bilge water from the gold of a ship.
 Bilge water Naut., water which collects in the bilge or bottom of a ship or other vessel. It is often allowed to remain till it becomes very offensive.
 Bilge ways, the timbers which support the cradle of a ship upon the ways, and which slide upon the launching ways in launching the vessel.
 bilge pump
      n : a pump to remove bilgewater