bilges (Noun) — In a vessel with two hulls, an enclosed area between the frames at each side.
bilges (Noun) — Water accumulated in the bilge of a ship.
bilges (Noun) — Where the sides of the vessel curve in to form the bottom.
bilges (Verb) — Cause to leak. ex. "the collision bilged the vessel"
bilges (Verb) — Take in water at the bilge. ex. "the tanker bilged"