boulder

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boulder¹

  • /ˈbəʊl.də(ɹ)/ UK
  • /ˈboʊl.dɚ/ US

Sounds like bolder · Rhymes with -əʊldə(ɹ)

Where it comes from

From late Middle English bulder, short for Middle English bulder ston (“a stone that's been worn into a round shape, boulder, cobblestone”), possibly from Old Swedish *buldersten, itself possibly from Old Swedish bulder (“rumble, noise”) + sten (“stone”); whence dialectal Swedish bullersten (“large stone in a stream, causing water to roar around it”). The first element may alternatively be allied to Old Swedish bulle, bolle (“round drinking vessel, tumbler”), from Old Norse bolli, related to Old English bolla (“round object, bowl”), see English bowl.

noun boulders · bowlder · bulder

  1. A large mass of stone detached from the surrounding land.
  2. A particle greater than 256 mm in diameter, following the Wentworth scale
  3. A large marble, in children's games. There were four sizes of marbles and we called them boulders, biggies, regulars, and teenies.
  4. A session of bouldering; involvement in bouldering.

verb boulders · bouldering · bouldered · bowlder · bulder

  1. ambitransitive To engage in bouldering. He bouldered a route in the same area with ease. Mitchell, 11, was hanging with the older kids in an area where bouldering nearly upside down seemed to be....

Boulder²

proper noun

  1. A town in Western Australia, merged with Kalgoorlie in 1989 as the City of Kalgoorlie-Boulder.
  2. A home rule municipality, the county seat of Boulder County, Colorado, United States.
  3. An unincorporated community in Clinton County, Illinois, United States.
  4. A town, the county seat of Jefferson County, Montana, United States.
  5. A small town in Garfield County, Utah, United States.
  6. An unincorporated community in Barbour County, West Virginia, United States.
  7. A census-designated place in Sublette County, Wyoming, United States.

Thesaurus

Closest in meaning: bowlder, stone, rock, cave, cliff, block, rocher, climber, kaya, roc, bloc, shek, crag, monolith, chunk, clast

Translations

Every language

noun large mass of stone

Españolpeña, peñasco
한국어바위 bawi
日本語玉石 tamaishi, 大石 ōishi, 丸石 maruishi
中文漂礫 /漂砾 piāolì, 磐石 pánshí, 頑石 /顽石 wánshí, 圓石頭 /圆石头 yuánshítou
हिन्दीपत्थर patthar
Portuguêspedregulho, rocha
Françaisrocher, boulder
DeutschFelsbrocken, Felsblock, Fels
Italianomacigno, masso
Ελληνικάογκόλιθος ogkólithos
Românăbolovan
Русскийвалу́н valún
עבריתגּוֹלָל golál

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Cite this
MLA

"boulder." Wiktionary, via Micwyn, micwyn.com/word/boulder. Accessed 6 Nov. 2026.

APA

boulder. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/boulder

Chicago

"boulder." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/boulder.

BibTeX
@misc{boulder_2026,
  title = {boulder},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/boulder},
  urldate = {2026-11-06}
}