boulder

noun

boul·​der ˈbōl-dər How to pronounce boulder (audio)
variants or less commonly bowlder
: a detached and rounded or much-worn mass of rock
bouldered adjective
bouldery adjective

Examples of boulder 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.
The plaque, installed in May 2024, is embedded in a boulder next to a bench near a grove of trees overlooking Point La Jolla. Ashley MacKin Solomon, San Diego Union-Tribune, 31 July 2025 Beach Park Fire Chief Tom Stahl and Winthrop Harbor Fire Chief Rocco Campanella sit, looking out at Lake Michigan, where a half-dozen boats trawl along the beachfront around the boulders of the breakwaters. Joseph States, Chicago Tribune, 30 July 2025 Near the monument that marks the site of the barn where Jews were killed, seven boulders with metal signs in Polish and English detailed a series of false claims, according to the Polish newspaper Gazeta Wyborcza. Shira Li Bartov, Sun Sentinel, 22 July 2025 These boulders get mixed in with much finer sand and clay to form what’s called a till. Laura Poppick july 22, Literary Hub, 22 July 2025 See All Example Sentences for boulder

Word History

Etymology

short for boulder stone, from Middle English bulder ston, partial translation of a word of Scandinavian origin; akin to Swedish dialect bullersten large stone in a stream, from buller noise + sten stone

First Known Use

1607, in the meaning defined above

Time Traveler
The first known use of boulder was in 1607

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Cite this Entry

“Boulder.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/boulder. Accessed 4 Aug. 2025.

Kids Definition

boulder

noun
boul·​der ˈbōl-dər How to pronounce boulder (audio)
: a large detached and rounded or worn mass of rock

Geographical Definition

Boulder

geographical name

Boul·​der ˈbōl-dər How to pronounce Boulder (audio)
city northwest of Denver in north central Colorado population 97,385

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