Noun boulder has 2 senses
  1. boulder, bowlder - a large smooth mass of rock detached from its place of origin
    --1 is a kind of rock, stone
    --1 has particulars: Plymouth Rock; glacial boulder; river boulder; shore boulder
  2. Boulder - a town in north central Colorado; Rocky Mountains resort center and university town
    --2 is a kind of
    town
    --2 is a part of Colorado, Centennial State, CO
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