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Noun: Sills
  1. United States operatic soprano (born in 1929)
    - Beverly Sills, Belle Miriam Silverman
Noun: sill  sil
  1. Structural member consisting of a continuous horizontal timber forming the lowest member of a framework or supporting structure
     
  2. (geology) a flat (usually horizontal) mass of igneous rock between two layers of older sedimentary rock

Type of: rock, soprano, stone, structural member

Encyclopedia: Sills, Cummis & Gross

Sill