The Collaborative International Dictionary of English v.0.48:

Lingerie \Lin`ge*rie"\ (l[a^]N`zhe`r[-e]"), n. [F.]
   Linen goods collectively; linen underwear or nightclothes,
   esp. of women; the clothing of linen and cotton with its
   lace, etc., worn by a women.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

lingerie
    n 1: women's underwear and nightclothes [syn: lingerie,
         intimate apparel]