of or relating to pressure exerted by the weight of overlying rock.
(of a construction) resistant to such pressure.
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British Dictionary definitions for geostatic
denoting or relating to the pressure exerted by a mass of rock or a similar substance: also: lithostatic
(of a construction) able to resist the pressure of a mass of earth or similar material
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