noun bilge water.
2. bilge ·vt to cause to bulge.
3. bilge ·vi to bulge.
4. bilge ·noun the protuberant part of a cask, which is usually in the middle.
5. bilge ·vt to fracture the bilge of, or stave in the bottom of (a ship or other vessel).
6. bilge ·vi to suffer a fracture in the bilge; to spring a leak by a fracture in the bilge.
7. bilge ·noun that part of a ship's hull or bottom which is broadest and most nearly flat, and on which she would rest if aground.