- a long, narrow box on or outside a window ledge, for growing plants
- one of the channels along the sides of a window frame for containing the weights that counterbalance the sash
window boxwindow box
- A usually long, narrow box for growing plants, placed on or hung from a windowsill or ledge.
- One of the vertical grooves on the inner sides of a window frame for the weights that counterbalance the sash.
(plural window boxes)