doorsill

Plural: doorsills

Noun

• The bottom horizontal member of a doorway; a threshold.
• 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
• The horizontal piece of material at the threshold of a doorway; a doorstep.

Examples

• His word extended across the doorsill of the board, connecting two bonus squares.

Synonyms

doorstep, threshold