1. United States operatic soprano (1929-2007)
   - Beverly Sills, Belle Miriam Silverman

1. Structural member consisting of a continuous horizontal timber forming the lowest member of a framework or supporting structure
   "The carpenter replaced the rotted window sill"
    
2. (geology) a flat (usually horizontal) mass of igneous rock between two layers of older sedimentary rock
   "The geologist identified a prominent sill in the cliff face"

Type of: rock, soprano, stone, structural member

Encyclopedia: Sills, Paul