The sill of a door; a horizontal piece of wood or stone that forms the bottom of a doorway and offers support when passing through a doorway. Synonyms:doorstep, threshold.
... tops fit into the two "caps," and each has a groove from top to bottom into which the ends of the boards of the front wall are inserted. A few dwellings have a door consisting of a single board set on end and swinging on a projection sunk in a hole in a doorsill buried in the earth; the upper part of the door swings on a string secured to the doorpost and passing through a hole ... — The Bontoc Igorot • Albert Ernest Jenks
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