- The definition of a doorsill is the threshold or dividing piece of wood or stone in the bottom of a doorway.
An example of a doorsill is the slightly raised piece of wood inside a wooden doorway.
Before entering, the woman pauses with her foot on the doorsill.
doorsill definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a length of wood, masonry, etc. along the bottom of a doorway; threshold
doorsill definition by American Heritage Dictionary
The threshold of a doorway.