boulder Meaning, Definition & Usage

  1. noun a large smooth mass of rock detached from its place of origin
    bowlder.
  2. noun a town in north central Colorado; Rocky Mountains resort center and university town

WordNet

Bowl"der, Boul"der noun (Also<
  • Bowlder
  • Boulder
)
Etymology
Cf. Sw. bullra to roar, rattle, Dan. buldre, dial. Sw. bullersteen larger kind of pebbles; perh. akin to E. bellow.
Definitions
  1. A large stone, worn smooth or rounded by the action of water; a large pebble.
  2. (Geol.) A mass of any rock, whether rounded or not, that has been transported by natural agencies from its native bed. See Drift.

Webster 1913