WordWeb Online

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

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 Sills, Cummis, Tichman, Epstein & Gross Sills, Cummis & Gross