Synonyms:
boulder, bowlder
Meaning: a large smooth mass of rock detached from its place of origin
Usage examples
In so doing he loosened a great boulder of rock, which fell upon George Curtis's right leg, crushing it frightfully.
At the same moment the convict screamed out a curse at us and hurled a rock which splintered up against the boulder which had sheltered us.
An immense stratum of granite, which here and there thrust out a wrinkled boulder, prevented the site from being used for building purposes.
Have you sometimes seen great boulder stones, as big as a small house, that stand alone by themselves in some field, or on some seashore, where no other rocks are near?