Origin: OE. Rother, AS. Rother a paddle; akin to D. Roer rudder, oar, G. Ruder, OHG. Roadar, Sw. Roder, ror, Dan. Roer, ror.
1. The mechanical appliance by means of which a vessel is guided or steered when in motion. It is a broad and flat blade made of wood or iron, with a long shank, and is fastened in an upright position, usually by one edge, to the sternpost of the vessel in such a way that it can be turned from side to side in the water by means of a tiller, wheel, or other attachment.