Definify.com
Webster 1913 Edition
Reservoir
1.
A place where anything is kept in store; especially, a place where water is collected and kept for use when wanted, as to supply a fountain, a canal, or a city by means of aqueducts, or to drive a mill wheel, or the like.
2.
(Bot.)
A small intercellular space, often containing resin, essential oil, or some other secreted matter.
Receiving reservoir
(Water Works)
, a principal reservoir into which an aqueduct or rising main delivers water, and from which a distributing reservoir draws its supply.
Webster 1828 Edition
Reservoir
RESERVOIR'
,Noun.