reservoir

The definition of a reservoir is place where a supply of something is collected, especially water.

(noun)

An example of a reservoir is an area where large amounts of water are stored.

See reservoir in Webster's New World College Dictionary

noun

a place where anything is collected and stored, generally in large quantity; esp., a natural or artificial lake or pond in which water is collected and stored for use
a receptacle or part (in an apparatus) for holding a fluid, as oil, ink, etc.
a large supply; esp., an extra or reserve supply
Biol.
1. a part, sac, or cavity in some animals or plants in which fluid collects or into which products are secreted
2. a species of organism that serves as an immune host for a parasite that can cause disease in another species
  in full reservoir host

Origin: Fr réservoir < réserver: see reserve

See reservoir in American Heritage Dictionary 4

noun

A natural or artificial pond or lake used for the storage and regulation of water.
A receptacle or chamber for storing a fluid.
An underground accumulation of petroleum or natural gas.
Anatomy See cisterna.
A large or extra supply; a reserve: a reservoir of good will.
Medicine An organism or a population that directly or indirectly transmits a pathogen while being virtually immune to its effects.

Origin:

Origin: French réservoir

Origin: , from réserver, to reserve

Origin: , from Old French reserver; see reserve

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