Without slipping refers to the condition where an object rolls along a surface without any part of it sliding or skidding. It means that there is no relative movement between the point of contact and the surface during rolling.
Related terms
Kinetic Friction: The force that opposes the relative motion between two surfaces in contact when they are sliding against each other.
Static Friction: The force that prevents an object from moving when a force is applied but there is no relative motion between the surfaces.
Coefficient of Friction: A value that represents the amount of friction between two surfaces.