1. a loose dress worn in bed by women and girls

Examples

• She put on her cotton nightgown before going to bed.
• The little girl’s nightgown had pink flowers on it.
• My grandmother always wore a long white nightgown to sleep.
• The silk nightgown was a gift for her birthday.
• She wrapped a robe over her nightgown before answering the door.
• The nightgown was too long and dragged on the floor.