← Back to browsebouldernoun#13,260Translations丸石まるいし岩いわ玉石たまいし転石てんせきEnglish definitiona large smooth mass of rock detached from its place of originExamplesMr Sato was standing on top of a boulder.The catapult hurled the boulder over the castle walls.Similar wordsbouldersboulderingbolderboundermouldershoulder← rationmanpower →