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View synonyms for boulder

boulder

1
or bowl·der

[ bohl-der ]

noun

  1. a detached and rounded or worn rock, especially a large one.


Boulder

2

[ bohl-der ]

noun

  1. a city in N Colorado.

boulder

/ ˈbəʊldə /

noun

  1. a smooth rounded mass of rock that has a diameter greater than 25cm and that has been shaped by erosion and transported by ice or water from its original position
  2. geology a rock fragment with a diameter greater than 256 mm and thus bigger than a cobble
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Derived Forms

  • ˈbouldery, adjective
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Other Words From

  • bouldered adjective
  • boulder·y adjective
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Word History and Origins

Origin of boulder1

1610–20; short for boulder stone; Middle English bulderston < Scandinavian; compare dialectal Swedish bullersten big stone (in a stream), equivalent to buller rumbling noise (< Old Swedish bulder ) + sten stone
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Word History and Origins

Origin of boulder1

C13: probably of Scandinavian origin; compare Swedish dialect bullersten , from Old Swedish bulder rumbling + sten stone
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Example Sentences

They found that boulders in this area showed bright veins, narrow in width but about a meter in length, similar to what’s found in other carbonaceous chondritic meteorites that have landed on Earth.

When NASA’s OSIRIS-REx arrived at near-Earth asteroid Bennu, scientists were dismayed to find a surface covered with hazardous-looking boulders.

She continues to boulder and sport-climb both at the gym and outdoors.

The trail finishes with a bang, as hikers must scramble hand over foot to climb several massive boulders on their way to the mesa top, where the modern world and parking lot await.

If you have trails or open space nearby, scaling small boulders works, too.

[Tatum laughs] Like I found the three other artsy goth kids at Boulder and hung out with them.

I did one semester at Boulder, which was more a stereotypical, American collegiate experience.

But even at Boulder I found the artsy kids and hung out with them.

Boulder was attractive because "it's beautiful and peaceful and people are nice—the opposite of New York—and my mother's there."

Talia Eisenberg is a self-described former New York “party girl” who moved to Boulder Colorado to get healthy.

On the opposite side of the stream, set back about thirty paces from the brink, stood a granite boulder.

At the far end we made a little fire and lay round it in the shadow of a big boulder.

Boulder beaches are so quick in answering to every slight change in the conditions which affect them that they seem almost alive.

The cutting is not altogether in the fixed material, for the boulder itself is also worn and scored in the work.

Here and there we will find a boulder perched on a pedestal of ice, which indicates a recent down-wearing of the field.

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BoulangismBoulder Canyon