boulder
A large mass of stone detached from the surrounding land.
Other meanings
A particle greater than 256 mm in diameter, following the Wentworth scale
A large marble, in children's games.
A kind of
- rock
Kinds of boulder
- glacial boulder
- shore boulder
Related words
- boulderless
- boulderlike
- bouldery
Word history
From Old Norse "bolli".
Where this comes from
This definition is adapted from “boulder” on Wiktionary, by its contributors; related-word lists use Open English WordNet (CC BY 4.0, based on Princeton WordNet), published under CC BY-SA 4.0. This page is published under the same licence.