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1. Oxford American Dictionary

   sill

   • IPA[sil]

   美式

   • n.
     a shelf or slab of stone, wood, or metal at the foot of a window or doorway.；a strong horizontal member at the base of any structure, e.g., in the frame of a motor or rail vehicle.

   • noun: sill, plural noun: sills

2. • 釋義

   n.

   名詞

   • 1. a shelf or slab of stone, wood, or metal at the foot of a window or doorway.
   • ▪ a strong horizontal member at the base of any structure, e.g., in the frame of a motor or rail vehicle.
   • ▪ a tabular sheet of igneous rock intruded between and parallel with the existing strata.
   • ▪ an underwater ridge or rock ledge extending across the bed of a body of water.