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.
Geology. See under pool1 (def. 6).
Biology. 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.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use reservoir in a sentence
The unit’s reservoir holds enough water for 90 seconds of use.
From 2009 to 2018, researchers measured the carbon content of springwater fed by the Velino aquifer, which is near the epicenter of the 2009 L’Aquila quake and sits atop a reservoir of CO2 in Earth’s crust.Carbon dioxide from Earth’s mantle may trigger some Italian earthquakes | Maria Temming | August 26, 2020 | Science News
Although salty water can be an extreme environment, the presence of an ocean suggests there might be more of these briny water reservoirs located elsewhere on the dwarf planet, raising hopes Ceres was once a habitable world—and might still be.The dwarf planet Ceres might be home to an underground ocean of water | Neel Patel | August 11, 2020 | MIT Technology Review
Tensions further arose when satellite images revealed a growing reservoir behind the GERD, angering Egypt and Sudan that had demanded that Ethiopia should not start filling the dam without an agreement.What Egypt, Sudan and Ethiopia must overcome to all benefit from the Grand Renaissance Dam | Addisu Lashitew | July 22, 2020 | Quartz
We also need rain to fill the reservoirs that provide drinking water.
He finished second in 2008 behind John McCain, and maintains a reservoir of good will among Republican social conservatives.
That had to give them an enormous reservoir of moral strength and solace.
“The reservoir for filovirus has remained a huge mystery,” Bruenn said in 2010.Ebola's Roots Are 50 Times Older Than Mankind. And That Could Be the Key to Stopping It. | Michael Daly | October 20, 2014 | THE DAILY BEAST
reservoir Dogs did fantastic internationally, so everyone was waiting for my new movie.The Secrets of ‘Pulp Fiction’: 20 Things You Didn’t Know About the Movie on Its 20th Anniversary | Marlow Stern | October 19, 2014 | THE DAILY BEAST
The animal reservoir for SARS is bats, whereas the reservoir for MERS is primarily camels.Is Middle East Respiratory Syndrome (MERS) the Next SARS? | Dr. Anand Veeravagu, MD, Tej Azad | May 3, 2014 | THE DAILY BEAST
The bag, being blown up, forms a wind reservoir and the amount of tone can be regulated by the pressure of the arm.The Recent Revolution in Organ Building | George Laing Miller
Then some genius steadied the wind pressure by pumping air into a reservoir partly filled with water.The Recent Revolution in Organ Building | George Laing Miller
A big tank that the city used to have for a reservoir had been bought by a sugar company and turned into a storage for molasses.The Sunbridge Girls at Six Star Ranch | Eleanor H. (Eleanor Hodgman) Porter
He was not writing yet; he was filling up his soul with the thing, making it a reservoir of impressions.Love's Pilgrimage | Upton Sinclair
And always the usual work of the suction-pumps went on, those pumps now fixed to this great reservoir of millions.The Nabob | Alphonse Daudet
British Dictionary definitions for reservoir
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
biology 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: a reservoir of talent
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for reservoir
A natural or artificial pond or lake used for the storage of water.
An underground mass of rock or sediment that is porous and permeable enough to allow oil or natural gas to accumulate in it.
An organism that is the host for a parasitic pathogen or that directly or indirectly transmits a pathogen to which it is immune.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.