/gri zuy", -zayl"/ ; Fr. /grddee zah"yeu/ , n. , pl. grisailles /-zuyz", -zaylz"/ ; Fr. /-zah"yeu/ for 2.
1. monochromatic painting in shades of gray.
2. a work of art, as a painting or stained-glass window, executed in grisaille.
[ 1840-50; gris gray + -aille n. suffix ]