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View synonyms for

fault line

noun

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


fault line

noun

  1. Also calledfault plane geology the surface of a fault fracture along which the rocks have been displaced
  2. a potentially disruptive division or area of contention

    Europe 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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Word History and Origins

Origin of fault line1

First recorded in 1865–70
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Example Sentences

Examples have not been reviewed.

Undeterred, she reached out directly to Osmond, who had been following the fault lines in the younger Huxleys' marriage with professional interest.

From

Lee’s novel of a 20th century Korean family exposes the fault lines in relationships and borders that are not drawn on a map.

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Rudy is depicted as an agent of the empire, but there’s a fault line in his being.

From

Perhaps the most apt metaphor for a book set in Los Angeles and Tehran is to simply say, “Liquid” is a book troubling the fault lines.

From

Given the city’s geographic proximity to a major fault line, his team had recommended that the government update its building codes to make structures more resilient and improve seismic contingency planning.

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faultlessfault plane