Glossary of Terms: Runout
WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
Lateral runout means measuring the movement or "wobble" of a wheel or tire at the side wall. Radial runout means measuring the out-of-round at the tread surface.