'nightie' definitions:

Definition of 'nightie'

(from WordNet)
noun
Lingerie consisting of a loose dress designed to be worn in bed by women [syn: nightgown, gown, nightie, night- robe, nightdress]

Definition of 'nightie'

From: GCIDE
  • nightie \nightie\ n.
  • 1. Any loose-fitting clothing for wear in bed. [PJC]
  • 2. Especially: a loose dress designed to be worn in bed by women; a nightgown.
  • Syn: nightgown, night-robe, nightdress. [WordNet 1.5]