peignoir means: Peignoir refers to the long, sheer, or chiffon over-garment that is worn by women over their negligee. It is a lightweight dressing gown that women wear in their private boudoirs. Their name is derived from French peigner which means to comb hair. This refers to those ladies who used to sit at dressing tables wearing silk chiffons and silks as they brushed their hair. (in Fashion Dictionary)

What else does peignoir mean?

The loose fitting dressing gown for a woman. (in Merlin Dictionary)