All three axes are perpendicular to each other and they are intersecting with each other at a certain point which is called Center Of Gravity,from which the weight of the body is considered to be act .

Rotation about Lateral Axis is called Pitch. The movement along Lateral axis causes vertical direction change of the Aircraft.

Rotation about Normal axis is known as YAW. This causes side to side movement of the aircraft.

Rotation about Longitudinal axis is known as Roll. This is actually the movement of the wings of the Aircraft. If one wing goes up then another wing must go down.