/win"doh payn'/ , n.
1. a plate of glass for filling a window sash within the frame.
2. a flounder, Scophthalmus aquosus, occurring along the Atlantic coast of North America, characterized by the thinness and translucency of its body.
adj.
3. designating or having a large, regular design of intersecting lines resembling a series of windowpanes: a windowpane plaid sweater.
[ 1810-20; WINDOW + PANE ]