Motion is a change in position of an object with respect to time and its reference point.

some examples of motion are:1.soldiers in a march past.2.motion of the earth around the sun.3.motion of a swing.4.motion of a pendulum.5.pedal of a bicycle in motion.6.hands of an athlete in a race.7.bullock cart moving on a straight road.8.motion of a branch of a tree.9.motion of a blade of an electric fan.10.motion of a top...

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Motion in science is the position,direction of motion and speed in respect of time of an object.
There r 3 motions
1)Rectilinear motion
2)Periodic motion 
3)Circular motion 
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