The Collaborative International Dictionary of English v.0.48:
Robe-de-chambre \Robe`-de-cham"bre\, n. [F., lit., a chamber gown.] A dressing gown, or morning gown. [1913 Webster] RoberdsmanWordNet (r) 3.0 (2006):
robe-de-chambre n 1: a robe worn before dressing or while lounging [syn: dressing gown, robe-de-chambre, lounging robe]