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 the chaos, panicked families dove behind boulders or flattened themselves on the grass. Ross Rosenfeld, MSNBC Newsweek, 23 Apr. 2025 This includes Sherburne-Marr’s Boulder Point subdivision on Warm Springs Mesa, where the company is building custom homes often highlighting and building around the natural boulders of the area. Nick Rosenberger, Idaho Statesman, 21 Apr. 2025 In 2024, things improved: the IOC separated the hyper-specialized discipline of speed climbing, but kept lead and boulder lumped together. Maya Silver, Outside Online, 13 Apr. 2025 The men were captured on video rolling boulders over a cliff at Lake Mead National Recreation Area, causing more than $1,000 in damage to the rock formation, McClatchy News reported. Brooke Baitinger, Sacbee.com, 11 Apr. 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 30 Apr. 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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