noun the bilge of a vessel. ·see bilge, 2.
2. bulge ·noun the bilge or protuberant part of a cask.
3. bulge ·vi to bilge, as a ship; to founder.
4. bulge ·noun a swelling, protuberant part; a bending outward, ·esp. when caused by pressure; as, a bulge in a wall.
5. bulge ·vi to swell or jut out; to bend outward, as a wall when it yields to pressure; to be protuberant; as, the wall bulges.