fault line

noun

: something resembling a fault : split, rift
… a major conceptual fault line in foreign policy …Morton Kondracke

Examples of fault line in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Most often, quake swarms are caused by fluids — typically water — interacting with fault lines, the federal agency said. Don Sweeney, Sacbee.com, 24 Mar. 2026 Now, similar fault lines are reemerging. Jeremy Gorner, Chicago Tribune, 23 Mar. 2026 But it's been a widening fault line within the Republican Party, which has been a bedrock of support for Israel over the years. ABC News, 19 Mar. 2026 Homogeneous teams miss these fault lines until systems break — or trust collapses — often after damage has already been done. Ed Gaskin, Boston Herald, 15 Mar. 2026 See All Example Sentences for fault line

Word History

First Known Use

1869, in the meaning defined above

Time Traveler
The first known use of fault line was in 1869

Browse Nearby Words

Cite this Entry

“Fault line.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fault%20line. Accessed 1 Apr. 2026.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster