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noun
1.
the act of rotating; a turning around as on an axis.
2.
Astronomy.

the movement or path of the earth or a heavenly body turning on its axis.
one complete turn of such a body.

3.
regularly recurring succession, as of officials.
4.
Agriculture. crop rotation.
5.
Mathematics.

an operation that rotates a geometric figure about a fixed point.
curl (def 14).

6.
Pool. a game in which the balls are played in order by number.
7.
Baseball. pitching rotation.
noun
1.
the act of rotating; rotary motion
2.
a regular cycle of events in a set order or sequence
3.
a planned sequence of cropping according to which the crops grown in successive seasons on the same land are varied so as to make a balanced demand on its resources of fertility
4.
(maths)

a circular motion of a configuration about a given point or line, without a change in shape
a transformation in which the coordinate axes are rotated by a fixed angle about the origin
another name for curl (sense 11) Abbreviation (for sense 4c) rot

5.

the spinning motion of a body, such as a planet, about an internal axis Compare revolution (sense 5a)
one complete turn in such motion

rotation ro·ta·tion (rō-tā’shən)
n.

The act or process of turning around a center or an axis.

Regular and uniform variation in a sequence or series, as in the recurrence of symptoms of a disease.

rotation
(rō-tā’shən)

The motion of an object around an internal axis.

A single complete cycle of such motion. See Note at revolution.

A transformation of a coordinate system in which the new axes have a specified angular displacement from their original position while the origin remains fixed.