ruff in French

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

Philomachus pugnax (syn. Calidris pugnax), a gregarious, medium-sized wading bird 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).

(zoology) A collar of lengthened or distinctively coloured fur on or around the neck of an animal.