Definition of rotation has definitions from the field of mathematics 1 [ noun ] the act of rotating as if on an axis Synonyms Examples "the rotation of the dancer kept time with the music" Used in print(R. P. Jerrard, "Inscribed squares in plane curves"...) But **f is just the curve **f translated without rotation through a small arc , for **f is always obtained by rotating C through exactly 90 ` . For it is clear that the total number of ordinary intersections of C and **f must be even ( otherwise , starting in the interior of C , **f could not finally return to the interior ) , and the center of rotation at t is the argument of the function , not a value . Related terms 2 [ noun ] (mathematics) a transformation in which the coordinate axes are rotated by a fixed angle about the origin Related terms 3 [ noun ] a planned recurrent sequence (of crops or personnel etc.) Examples "crop rotation makes a balanced demand on the fertility of the soil" "the manager had only four starting pitchers in his rotation" Related terms 4 [ noun ] a single complete turn (axial or orbital) Synonyms Examples "the plane made three rotations before it crashed" "the revolution of the earth about the sun takes one year" *