base level


noun Geology.

the lowest level to which running water can erode the land.

Origin of base level

First recorded in 1870–75
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British Dictionary definitions for base level

base level

noun

the lowest level to which a land surface can be eroded by streams, which is, ultimately, sea level
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