boulder

noun

boul·​der ˈbōl-dər 

variants or less commonly bowlder

: a detached and rounded or much-worn mass of rock

bouldered

ˈbōl-dərd 

adjective

bouldery

ˈbōl-d(ə-)rē 

adjective

Examples of boulder in a Sentence

Recent Examples on the Web

About 2 feet of water remained above the crack as of Wednesday evening, and workers had covered nearly 45 feet of the crack with boulders. —CBS News, 11 Apr. 2024

Dusty Booze Imagine an Indiana Jones tale — if the golden idol was a bottle of post-Prohibition bourbon and the role of gigantic, skull-crushing boulder was played by rampaging hipsters on a Pappy Van Winkle hunt. —Jackie Burrell, The Mercury News, 3 Apr. 2024

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

Kids Definition

boulder

noun

boul·​der ˈbōl-dər 

: a large detached and rounded or worn mass of rock

Geographical Definition

Boulder

geographical name

Boul·​der ˈbōl-dər 

city northwest of Denver in north central Colorado population 97,385