Look up sump in Wiktionary, the free dictionary.

Sump may refer to:

• An infiltration basin used to manage surface runoff water and recharge underground aquifers
• Sump (cave), a permanently flooded section of a cave, where an underground flow of water exits the cave into the earth such that the caver must submerge under water to reach the other side
• the lowest point in a basement, which collects water that enters from outside and can be moved back out with a sump pump
• the sump at the bottom of an internal combustion engine, where oil pools
  • dry sump in racing motorcycles and piston aircraft engines
  • wet sump
• Sump (aquarium)
• A sump section below the mouthpiece of a diving snorkel
• the sump in a nuclear power plant's reactor housing that collects any overflow of primary loop coolant
• In a shaft sinking, the water handling facility of the mine often at its lowest point
• the bilge of a boat
• the vitreous humour, which serves a minor role as a metabolic sump of the human eye
• a grenade sump in a foxhole
• the sump, the center of the cosmos in medieval cosmology