A rotation which is not about a particular axis.
Blue is a non-example.
A banana is a non-example.
Blue cheese is a non-example of friction.
An inertial frame of reference (FOR) is a non-accelerating FOR , for example if a person is observing a moving car while at rest or while moving at constant velocity, he is in an inertial FOR. A non-inertial frame of reference is an accelerating FOR for example a rotating FOR. ( Rotation requires centripetal force and centripetal acceleration so any rotating object always requires a centripetal acceleration to rotate.)
An obvious non-example of rotation is the earth REVOLVING around the sun
is head up and down,arm rotation etc.
A rotation which is not about a particular axis.
A rotation turns a shape through an angle at a fixed point as for example if you turn around backwards that will be a rotation of 180 degrees.
it rotation
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rotation
rotation
rotation
Think of uniform as everything moving together. For example, in uniform circular motion describes the motion of a body traversing a circular path at constant speed. The distance of the body from the axis of rotation remains constant at all times. If the motion was non-uniform the distance of the body from the axis of rotation would vary.
Retrograde rotation
Green is a non example of altitude.