noun.
A nightgown; femaleattire designed to be worn to bed.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
lingerie consisting of a loose dress designed to be worn in bed by women
Word Usage
"I must have pinched up a piece of loose skin and have transfixed it, for there are two little red points like pin-pricks, and on the band of her nightdress was a drop of blood."