Definition of ruffs:
(n) :
A circular frill or ruffle on a garment, especially a starched, fluted frill at the neck in Elizabethan and Jacobean England (1560s–1620s).
(n) :
Anything formed with plaits or flutings like a frill.
(n) :
Senses relating to animals.
(n) :
A gregarious, medium-sized wading bird of species Calidris pugnax (syn. Philomachus pugnax), of Eurasia; specifically, a male of the species which develops a distinctive ruff of feathers and ear tufts during mating season (the female is called a reeve).
(n) :
(ornithology) A set of lengthened or otherwise modified feathers on or around the neck of a bird.
(n) :
(zoology) A collar of lengthened or distinctively coloured fur on or around the neck of an animal.