water table

noun
1.
the planar, underground surface beneath which earth materials, as soil or rock, are saturated with water.
2.
Architecture. a projecting stringcourse or similar structural member placed so as to divert rain water from a building.
Also, watertable.


Origin:
1400–50; late Middle English

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
water table
 
n
1.  the surface of the water-saturated part of the ground, usually following approximately the contours of the overlying land surface
2.  an offset or string course that has a moulding designed to throw rainwater clear of the wall below

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
water table  
The upper surface of an area filled with groundwater, separating the zone of aeration (the subsurface region of soil and rocks in which the pores are filled with air and usually some water) from the zone of saturation (the subsurface region in which the pores are filled only with water). Water tables rise and fall with seasonal moisture, water absorption by vegetation, and the withdrawal of groundwater from wells, among other factors. The water table is not flat but has peaks and valleys that generally conform to the overlying land surface. Compare potentiometric surface.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

water table definition


The depth (measured from the surface of the Earth) at which underground water is first encountered.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
It happens the water table is only a half meter down and the buildings are
  sinking.
As the channel deepens and the elevation of the river drops, the water table
  beneath the riparian areas drops correspondingly.
All other proposed sites are below the water table, where any openings
  eventually fill with groundwater.
Its removal lowers the water table and accelerates the city's subsidence.
Image for water table
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