Topic: GEOLOGY
| Date: | 1600-1700 |
| Language: | French |
| Origin: | réservoir, from Old French reserver; RESERVE1 |
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res‧er‧voir
[countable]
[countable]1DN a lake, especially an artificial one, where water is stored before it is supplied to people's houses
2 a large amount of something that is available and has not yet been used
3 technicalT a part of a machine or engine where a liquid is kept before it is used
