<p><strong>Noun</strong></p><ul><li>Electricity: a rotating member of a machine.</li><li>Compare stator (def 1).</li><li>Aeronautics: a system of rotating airfoils, as the horizontal ones of a helicopter or of the compressor of a jet engine.</li><li>Any of a number of tall, cylindrical devices mounted on a special rotor ship and rotated in such a way that the Magnus effect of wind impinging on the cylinders is used to drive and maneuver the vessel.</li><li>(In a self-winding watch): a weight eccentrically mounted on an arbor for keeping the mainspring wound.</li></ul><p><strong>End of Response</strong></p>