from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Water beneath the earth's surface, often between saturated soil and rock, that supplies wells and springs.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Water that exists beneath the earth's surface in underground streams and aquifers.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. underground water that is held in the soil and in pervious rocks


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