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, 10 May 2026 The problem cuts along predictable fault lines. Tristan Bove, Fortune, 4 May 2026 There are also small fault lines in the layers, evidence of past earthquakes. ArsTechnica, 2 May 2026 More broadly, researchers hope to apply the technology around the world to track things like natural disasters, changes in fault lines, the effects of climate change in regions like Antarctica and more. Megan Janetsky, Los Angeles Times, 1 May 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 11 May. 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