understeer noun 1verb 1forms 3 noun1 •The condition in which the front wheels of a car fail to follow the desired curve while cornering, instead following more of a straight-line trajectory, losing a degree of traction, and so slipping off the required line. verb1 •The action of a car when it does not follow the desired curve while cornering. Tyre slip of the front wheels. formsundersteered · understeering · understeers