Question

what do mean by rotatory motion

Answer 1

Instead of translating, moving in a straight line, the object moves about an axis in a circle. ... We can thus formalize our definition of rotational motion as such: A rigid body moves in rotational motionif every point of the body moves in a circular path with a common axis.

Answer 2

Rotation of an object along a circular path in a fixed orbit is called rotatory motion.Eg- movement of a giant wheel.