A nightgown is basically a comfy dress you wear for sleeping. Some people prefer pajamas, while others like nightgowns better.

Nightgowns are typically worn by women and girls, although they are closely related to nightshirts, which have long been considered appropriate night wear for people of any gender. Nightgowns often have pretty details like embroidery or lace, and they're made of cotton, silk, or nylon. The word nightgown dates from about 1400.

Definitions of nightgown

n lingerie consisting of a loose dress designed to be worn in bed by women

gown, night-robe, nightdress, nightie
Type of:
intimate apparel, lingerie
women's underwear and nightclothes
nightclothes, nightwear, sleepwear
garments designed to be worn in bed

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