Rotation refers to the circular movement of an object around a central axis or fixed point. In physics, it describes the motion where every point of the object moves along a circular path with a consistent angular velocity. Rotation is fundamental in mechanics, astronomy, and engineering, governing phenomena like planetary orbits, wheel motion, and gyroscopic effects. Unlike translation (linear movement), rotation preserves the object's shape while changing its orientation. Key parameters include angular displacement, velocity, and acceleration, often measured in radians or degrees. Rotational dynamics involves torque, moment of inertia, and angular momentum, which determine how forces affect spinning objects. Rotation is essential in applications ranging from engines to celestial mechanics.