variants:
or less commonly bowlder
Definition of boulder
(Entry 1 of 2)
: a detached and rounded or much-worn mass of rock
Boulder
geographical nameDefinition of Boulder (Entry 2 of 2)
city northwest of Denver in north central Colorado population 97,385
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Merriam-Webster unabridged
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Time Traveler for boulder
The first known use of boulder was in 1607
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