from The American Heritage® Dictionary of the English Language, 4th Edition
- intransitive v. To turn less sharply than the operator would expect. Used of vehicles, especially automobiles.
- n. An instance of understeering.
- n. A tendency to understeer.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The condition in which the front wheels of a car don't follow the desired curve while cornering, instead following a more straight line trajectory. The front wheels loosing a degree of traction and so slipping off the required line.
- v. The action of a car when it does not follow the desired curve while cornering. Tyre slip of the front wheels.
under + steer (Wiktionary)