boulder

boul·der

noun \ˈbōl-dər\

Definition of BOULDER

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

— boul·dered \-dərd\ adjective

— boul·dery \-d(ə-)rē\ adjective

Variants of BOULDER

boul·der also bowl·der \ˈbōl-dər\

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

anthracite, cwm, erratic, igneous, intrusive, mesa, sedimentary, silt, swale

Rhymes with BOULDER

folder, holder, molder, polder, scolder, shoulder, smolder