Definition of "rigidity"

The quality or state of being rigid; lack of pliability; the quality of resisting change of physical shape  examples

The amount of resistance with which a body opposes change of form.  examples

Stiffness of appearance or manner; want of ease or elegance.  examples

(economics) stickiness (of prices/wages etc.). Describing the tendency of prices and money wages to adjust to changes in the economy with a certain delay.  examples