linchpin

noun

linch·​pin ˈlinch-ˌpin How to pronounce linchpin (audio)
variants or less commonly
1
: a locking pin inserted crosswise (as through the end of an axle or shaft)
2
: one that serves to hold together parts or elements that exist or function as a unit
the linchpin in the defense's case

Did you know?

In his 1857 novel, Tom Brown's School Days, Thomas Hughes describes the "cowardly blackguard custom" of "taking the linch-pins out of the farmers' and bagmens' gigs at the fairs." The linchpin in question held the wheel on the gig and removing it made it likely that the wheel would come off as the vehicle moved. Such a pin was called a lynis in Old English; Middle English speakers added pin to form lynspin. By the early 20th century, English speakers were using linchpin for anything as critical to a complex situation as a linchpin is to a wagon, as when Winston Churchill, in 1930, wrote of Canada and the role it played in the relationship between Great Britain and the United States, that "no state, no country, no band of men can more truly be described as the linchpin of peace and world progress."

Examples of linchpin in a Sentence

This witness is the linchpin of the defense's case.
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.
The dramatic linchpin of this disaster comes when the water recedes back out to sea and separates Buck from Christopher, who has cerebral palsy. Laura Bradley, Vulture, 25 Sep. 2024 In this new reality, the most successful CMOs will be those who recognize and empower their insights teams as the linchpin of their strategic initiatives, turning data into a powerful force that underpins every decision. Nataly Kelly, Forbes, 15 Oct. 2024 Sequels and reboots and rereleases may be the linchpins of Hollywood’s nostalgia-industrial complex, but goth’s comeback goes beyond the reanimation of dormant titles. Judy Berman, TIME, 10 Oct. 2024 It’s taken decades of painstaking effort to rebuild America’s profitable steel industry, beat back unfair trade practices by countries like China and Japan, and position domestic steelmaking as a linchpin of U.S. national security. David McCall, Fortune, 4 Oct. 2024 See all Example Sentences for linchpin 

Word History

Etymology

Middle English lynspin, from lyns linchpin (from Old English lynis) + pin; akin to Middle High German luns linchpin

First Known Use

13th century, in the meaning defined at sense 1

Time Traveler
The first known use of linchpin was in the 13th century

Dictionary Entries Near linchpin

Cite this Entry

“Linchpin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/linchpin. Accessed 26 Nov. 2024.

Kids Definition

linchpin

noun
linch·​pin ˈlinch-ˌpin How to pronounce linchpin (audio)
: a pin inserted crosswise through something (as the end of an axle or shaft) to keep things in place
Last Updated: - Updated example sentences
Love words? Need even more definitions?

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