Dictionary
boulder
noun boul·der \ˈbōl-dər\
: a very large stone or rounded piece of rock
Full Definition of BOULDER
: a detached and rounded or much-worn mass of rock
— boul·dered \-dərd\ adjective
— boul·dery \-d(ə-)rē\ adjective
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Variants of BOULDER
boul·der also bowl·der \ˈbōl-dər\
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Origin of BOULDER
short for boulder stone, from Middle English bulder ston, part 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: 1617
Other Geology Terms
Boulder
geographical name Boul·der \ˈbōl-dər\
Definition of BOULDER
city N cen Colorado pop 97,385
BOULDER Defined for Kids
boulder
noun boul·der \ˈbōl-dər\
Definition of BOULDER for Kids
: a very large rounded piece of rock
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