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fault line

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noun Geology.

the intersection of a fault with the surface of the earth or other plane of reference.

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Origin of fault line

First recorded in 1865–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use fault line in a sentence

British Dictionary definitions for fault line

fault line

noun

Also called: fault plane geology the surface of a fault fracture along which the rocks have been displaced
a potentially disruptive division or area of contentionEurope remains the main fault line in the Tory Party
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
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