For a member on which a force acts, the stress is the amount of force divided by the area that supports the force. Thus, stress is a measure of force intensity and is therefore similar to pressure. High stress (relative to the material's fatigue strength) is the main cause of failure in resonators.

Also see —
Compressive stress
Circumferential stress
Dynamic stress
Flexure stress
Hoop stress
Normal stress
Relative stress
Radial stress
Shear stress
Static stress
Stress concentration
Stress concentration factor
Stress concentrator
Tangential stress
Tensile stress
von Mises stress