Definitions:

1. A lightweight, soft cotton fabric that has a smooth texture and is typically used for making garments such as underwesr, baby clothes, and lingerie. NOUN
   • She chose a delicate nainsook fabric to make a lightweight summer dress.
2. A soft, fine muslin fabric, often used to make babies' clothing. NOUN
   • The baby's outfit was made of soft, breathable nainsook.

Synonyms:

• muslin