- a thin board serving as a stool of a window.
Origin of window board
First recorded in 1620–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for window board
The man bowed, took the bread, and laid it beside him on the window-board.The Bramleighs Of Bishop's Folly
Charles James Lever
In winter, ventilation is best secured by means of a window-board.
At one moment he was jostled by a porter, at another trod on by a horse; then he knocked his head against a window-board.The German Lieutenant and Other Stories
A window-board was installed, with the result that the men recovered and no other cases of skin rash occurred in that room.