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.
In a cult classic 1976 film, The Bill Koch Experience, the star slaloms at perilous speed through low brush, dodges cows in a pasture, and also leaps off a boulder, only to tumble. Bill Donahue, Outside, 14 Feb. 2026 Goldsworthy had filled a gallery, wall to wall, with a sea of stones, ranging from pebbles to small boulders. Rebecca Mead, New Yorker, 9 Feb. 2026 The memorial at the park includes a tree, bench, plaque and boulder. Jim Dudlicek, Chicago Tribune, 9 Feb. 2026 The pivot could have been toward Morant or some other talent that some/all in that brain trust consortium identified as a piece to get the roster over the top, instead the ongoing Sisyphean task of pushing the boulder up the play-in mountain. Ira Winderman, Sun Sentinel, 7 Feb. 2026 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 16 Feb. 2026.

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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