Nightgown (noun)

A loose-fitting garment, usually made of cotton, flannel, or silk, worn for sleeping or lounging.

Origin:

From night + gown, the garment being worn for sleep or lounging at night.

Examples:

1. She slipped into her soft, comfortable nightgown after taking a relaxing bath.
2. His grandmother gave him a warm, flannel nightgown for Christmas.
3. She felt pampered and luxurious in her silky nightgown as she lounged in bed with a book.
4. The nightgown was so long and flowing that it almost touched the ground when she walked.
5. She loved the feeling of her skin against the soft cotton of her favorite nightgown.