(mathematics) a transformation in which the coordinate axes are rotated by a fixed angle about the origin, A single complete cycle around a centre or an axis, The act of turning, as a wheel or a solid body on its axis, as distinguished from the progressive motion of a revolving round another body or a distant point; thus, the daily turning of the earth on its axis is a rotation; its annual motion round the sun is a revolution, adjective_ Pertaining to, or resulting from, rotation; of the nature of, or characterized by, rotation