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Definition of Aquifer

Babylon English Dictionary

underground stratum of rock or gravel which holds water (supplies water for springs, wells, etc.)
Aquifer Definition from Business & Finance Dictionaries & Glossaries
Glossary of petroleum Industry
A water-bearing rock strata. In a water-drive field the aquifer is the water zone of a reservoir, underlying the oil zone. When wells are drilled in the reservoir, the water pushes the oil toward the wells boreholes. If the wells are produced at an excessive rate the water may bypass the oil and break into the well bore, leaving much of the oil behind. See Channeling, also Water Coning. aquifer 1. a rock that contains water. 2. the part of a water-drive reservoir that contains the water.
Aquifer Definition from Social Science Dictionaries & Glossaries
Environmental Economics Glossary
Underground source of water
Aquifer Definition from Science & Technology Dictionaries & Glossaries
A subsurface permeable geologic formation which contains water.
Glossary of water terms
a geologic formation(s) that is water bearing. A geological formation or structure that stores and/or transmits water, such as to wells and springs. Use of the term is usually restricted to those water-bearing formations capable of yielding water in sufficient quantity to constitute a usable supply for people's uses.
soil or rock below the land surface that is saturated with water. There are layers of impermeable material both above and below it and it is under pressure so that when the aquifer is penetrated by a well, the water will rise above the top of the aquifer.
an aquifer whose upper water surface (water table) is at atmospheric pressure, and thus is able to rise and fall.
Technical English by wpv
A porous, subsurface geological structure carrying or holding water.
Aquifer Definition from Encyclopedia Dictionaries & Glossaries
Wikipedia English - The Free Encyclopedia
An aquifer is an underground layer of water-bearing permeable rock or unconsolidated materials (gravel, sand, or silt) from which groundwater can be extracted using a water well. The study of water flow in aquifers and the characterization of aquifers is called hydrogeology. Related terms include aquitard, which is a bed of low permeability along an aquifer, and aquiclude (or aquifuge), which is a solid, impermeable area underlying or overlying an aquifer. If the impermeable area overlies the aquifer pressure could cause it to become a confined aquifer.

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Aquifer Definition from Society & Culture Dictionaries & Glossaries
EPA Terms of Environment
An underground geological formation, or group of formations, containing water. Are sources of groundwater for wells and springs.
Provided as a public service by the U.S. Environmental Protection Agency
Environmental Engineering (English ver.)
A geologic sub-surface formation, group of formations, or part of a formation that contains sufficient saturated, permeable material to yield useful quantities of ground water to wells and springs.
  A natural underground layer of porous, water-bearing materials (sand, gravel) usually capable of yielding a large amount or supply of water.
Aquifer Definition from Entertainment & Music Dictionaries & Glossaries
English to Federation-Standard Golic Vulcan
Aquifer Definition from Language, Idioms & Slang Dictionaries & Glossaries
WordNet 2.0

1. underground bed or layer yielding ground water for wells and springs etc
(hypernym) geological formation, formation