rudder

noun

1. a hinged vertical airfoil mounted at the tail of an aircraft and used to make horizontal course changes
   Terjemahkan ke Indonesia sumber: wordnet30
2. (nautical) steering mechanism consisting of a hinged vertical plate mounted at the stern of a vessel
   Terjemahkan ke Indonesia sumber: wordnet30
3. A riddle or sieve.
   Terjemahkan ke Indonesia sumber: webster1913
4. 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.
   Terjemahkan ke Indonesia sumber: webster1913
5. In an aircraft, a surface the function of which is to exert a turning moment about an axis of the craft.
   Terjemahkan ke Indonesia sumber: webster1913