- a natural or artificial place where water is collected and stored for use, especially water for supplying a community, irrigating land, furnishing power, etc.
- a receptacle or chamber for holding a liquid or fluid.
- See under pool1 (def. 6).
- a cavity or part that holds some fluid or secretion.
- a place where anything is collected or accumulated in great amount.
- a large or extra supply or stock; reserve: a reservoir of knowledge.
- a natural or artificial lake or large tank used for collecting and storing water, esp for community water supplies or irrigation
- a receptacle for storing gas, esp one attached to a stove
- a vacuole or cavity in an organism, containing a secretion or some other fluid
- anatomy another name for cisterna
- a place where a great stock of anything is accumulated
- a large supply of something; reserve
