sump

(noun, verb)

noun

1. an oil reservoir in an internal combustion engine

Definition categories: man–made, reservoir

2. a well or other hole in which water has collected

Definition categories: man–made, well

3. a covered cistern; waste water and sewage flow into it

Similar word(s): cesspit, cesspool, sink

Definition categories: man–made, cistern

verb

1. (transitive) Of a cave passage, to end in a sump, or to fill completely with water on occasion.