n. 1. A crest or knot of feathers upon the head or top, as of a bird; also, an ornamental knot worn on top of the head, as by women. [ 1913 Webster ]
A great, stout servant girl, with cheeks as red as her topknot. Sir W. Scott. [ 1913 Webster ]
2. (Zool.) A small Europen flounder (Rhoumbus punctatus). The name is also applied to allied species. [ 1913 Webster ]