Mobcap

noun

1. A large high frilly cap with a full crown, worn indoors by women in the 1700s and early 1800s.
2. A cap with a bag-shaped or puffy crown and a broad band and frills.
3. A plain cap or headdress for women or girls; especially, one tying under the chin by a very broad band, generally of the same material as the cap itself.
4. Alternative form of mob cap.
5. large high frilly cap with a full crown; formerly worn indoors by women