ˈ ̷ ̷ˌ ̷ ̷ noun
1. : the figure enclosed by lines through the points of contact of the wheels of a vehicle with the surface or rails on which they run ; especially : the length of this figure measured in the direction of motion of the vehicle
2. : the distance in inches between the front and rear axles of an automotive vehicle or between the centers of the points of contact of the front and rear wheels with the ground