Source : Webster's Revised Unabridged Dictionary (1913)

Peignoir \Pei`gnoir"\, n. [F., fr. peigner to comb, L.
   pectinare. See {Pectinate}.]
   A woman's loose dressing sack; hence, a loose morning gown or
   wrapper.

Source : WordNet®

peignoir
     n : a loose dressing gown for women [syn: {negligee}, {neglige},
          {wrapper}, {housecoat}]