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