a projecting or conspicuously coloured ring of feathers or hair round the neck of a bird or mammal
a ruff of long pointed feathers
my nape stirred like the ruff of a dog in a thunderstorm
a pigeon of a domestic breed with a ruff of feathers on its neck
a North Eurasian wading bird, the male of which has a large variously coloured ruff and ear tufts in the breeding season, used in display
(in bridge, whist, and similar card games) play a trump in a trick which was led in a different suit
declarer ruffed and then led a heart