noun res·er·voir \ˈre-zə-ˌvwär, -zər-, -ˌvwr also -ˌvi\

: a usually artificial lake that is used to store a large supply of water for use in people's homes, in businesses, etc.

: a place (such as a part of a machine) where a liquid is stored

: an extra supply of something

Full Definition of RESERVOIR

:  a place where something is kept in store: as
a :  an artificial lake where water is collected and kept in quantity for use
b :  a part of an apparatus in which a liquid is held
c :  supply, store <a large reservoir of educated people>
:  an extra supply :  reserve
:  an organism in which a parasite that is pathogenic for some other species lives and multiplies usually without damaging its host

Examples of RESERVOIR

  1. The pen has a large ink reservoir.
  2. Colleges and universities provide reservoirs of talent for job recruiters.
  3. She found the reservoirs of energy she needed to finish the job.


French réservoir, from Middle French, from reserver
First Known Use: 1690

Other Ecology Terms

Malthusian, anthropogenic, biomass, carbon footprint, crepuscular, niche, sere, symbiosis, taiga, tundra
RESERVOIR Defined for Kids


noun res·er·voir \ˈre-zər-ˌvwär\

Definition of RESERVOIR for Kids

:  a place where something (as water) is kept in store for future use
Medical Dictionary


noun res·er·voir \ˈrez-ə(r)v-ˌwär, -ə(r)v-ˌ(w)r\

Medical Definition of RESERVOIR

:  a space (as an enlargement of a vessel or the cavity of a glandular acinus) in which a body fluid is stored
:  an organism in which a parasite that is pathogenic for some other species lives and multiplies without damaging its host; also :  a noneconomic organism within which a pathogen of economic or medical importance flourishes without regard to its pathogenicity for the reservoir <rats are reservoirs of plague>—compare carrier 1a


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