There are 2 main definitions of boulder in English:

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boulder 1

Syllabification: boul·der
Pronunciation: /ˈbōldər/


A large rock, typically one that has been worn smooth by erosion.
Example sentences
  • The organisation said the most numerous relics were rock carvings found on boulders and outcrops.
  • The trail narrowed, weaving round giant boulders and overhangs of smooth rock.
  • The reverie was broken as if someone hurled a boulder into a smooth flowing stream.


Example sentences
  • A bouldery summit with a large cairn looms large, fooling many into believing this is the summit.
  • The Spey snakes between rolling hills, with stretches of bouldery rapids and limpid pools where salmon leap and plop.
  • Flanagan lowered his close-shaved, bouldery head, studied me with unwavering eyes, then took a swallow from his pint.


Late Middle English: shortened from earlier boulderstone, of Scandinavian origin.

Words that rhyme with boulder

beholder, folder, holder, moulder (US molder), polder, scolder, shoulder, smoulder (US smolder), upholder, withholder
Definition of boulder in:
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There are 2 main definitions of boulder in English:

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Boulder 2 Syllabification: Boul·der
Pronunciation: /ˈbōldər/
A city in north central Colorado, northwest of Denver, home to the University of Colorado; population 94,171 (est. 2008).
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