Definition of "nightgown" []

• A loose garment worn in bed by women and girls. Also called nightdress. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Jareth was half asleep when Sarah came out of the bathroom now wearing a beige satin nightgown and matching robe."
• "And, Betsy, be sure Molly's nightgown is buttoned up all the way."
• "Obviously she says yes, in an excited flutter (notice the bed and her nightgown are all white)."