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boulder definition

boul·der (bōl′dər)

noun

  1. any large rock worn smooth and round by weather and water
  2. Geol. such a rock larger than a cobblestone with a diameter of at least 256 mm (c. 10 in)

Etymology: ME bulder, short for bulderston < Scand, as in Swed bullersten, lit., noisy stone < bullra, to roar (akin to bellow) + sten, stone

Boulder definition

Boul·der (bōl′dər)

city in NC Colo.: pop. 95,000

Etymology: from the abundance of large rocks there

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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