The Collaborative International Dictionary of English v.0.48:
Bilge \Bilge\, n. [A different orthography of bulge, of same
origin as belly. Cf. Belly, Bulge.]
1. The protuberant part of a cask, which is usually in the
2. (Naut.) That part of a ship's hull or bottom which is
broadest and most nearly flat, and on which she would rest
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
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.