A circular frill or ruffle on a garment, especially a starched, fluted frill at the neck in Elizabethan and Jacobean England (1560s–1620s).

Anything formed with plaits or flutings like a frill.

Senses relating to animals.

To shape (fabric, etc.) into a ruff; to adorn (a garment, etc.) with a ruff.

Of a falcon, hawk, etc.: to hit (the prey) without fixing or grabbing hold of it.

To ruffle; to disorder.