/rez"euhr vwahr', -vwawr', -vawr', rez"euh-/ , n.
1. a natural or artificial place where water is collected and stored for use, esp. water for supplying a community, irrigating land, furnishing power, etc.
2. a receptacle or chamber for holding a liquid or fluid.
3. Geol. See under pool 1 (def. 6).
4. Biol. a cavity or part that holds some fluid or secretion.
5. a place where anything is collected or accumulated in great amount.
6. a large or extra supply or stock; reserve: a reservoir of knowledge.
[ 1680-90; réservoir, equiv. to réserv ( er ) to RESERVE + -oir -ORY 2 ]
Syn. 5. store, pool, fund, stockpile, hoard.