sump

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Definitions from WordNet

Noun sump has 3 senses

sump - an oil reservoir in an internal combustion engine
--₁ is a kind of reservoir
sump - a well or other hole in which water has collected
--₂ is a kind of well
cesspool, cesspit, sink, sump - a covered cistern; waste water and sewage flow into it
--₃ is a kind of cistern

Definitions from the Web

Sump

Noun

Sense 1: A pit or reservoir that collects liquid, especially oil or water.

Example sentence: The basement had a sump to collect any water that might seep in during heavy rains.

Noun

Sense 2: The lowest part in a machine or system where fluids collect.

Example sentence: The sump in the car's engine needed to be drained and refilled with fresh oil.

Noun

Sense 3: A small depression or hollow.

Example sentence: She found a beautiful flower blooming in the sump of the old tree.

Verb

Sense 1: To drain or remove liquid from a sump.

Example sentence: Make sure to sump the excess water from the fish tank regularly.