boulder

noun boul·der \ ˈbōl-dər \
variants: or less commonly
Updated on: 1 Dec 2017

Definition of boulder

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

bouldered

play \-dərd\ adjective

bouldery

play \-d(ə-)rē\ adjective

Recent Examples of boulder from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'boulder.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of boulder

short for boulder stone, from Middle English bulder ston, partial translation of a word of Scandinavian origin; akin to Swedish dialect bullersten large stone in a stream, from buller noise + sten stone


Boulder

geographical name Boul·der \ ˈbōl-dər \

Definition of Boulder

city northwest of Denver in north central Colorado population 97,385

BOULDER Defined for English Language Learners

boulder

noun

Definition of boulder for English Language Learners

  • : a very large stone or rounded piece of rock


BOULDER Defined for Kids

boulder

noun boul·der \ ˈbōl-dər \

Definition of boulder for Students

: a very large rounded piece of rock


Seen and Heard

What made you want to look up boulder? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to provide what is needed to exist

Get Word of the Day daily email!

Test Your Vocabulary

Intact Latin Quiz

  • roman-tablet
  • What did focus mean in Latin?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Add Diction

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!