1. a wheel that drives a motor vehicle (transforms torque into a tractive force);
The Collaborative International Dictionary of English v.0.48:
Driving \Driv"ing\, a.
1. Having great force of impulse; as, a driving wind or
2. Communicating force; impelling; as, a driving shaft.
Driving axle, the axle of a driving wheel, as in a
Driving box (Locomotive), the journal box of a driving
axle. See Illust. of Locomotive.
Driving note (Mus.), a syncopated note; a tone begun on a
weak part of a measure and held through the next accented
part, thus anticipating the accent and driving it through.
Driving spring, a spring fixed upon the box of the driving
axle of a locomotive engine to support the weight and
deaden shocks. [Eng.] --Weale.
Driving wheel (Mach.), a wheel that communicates motion;
one of the large wheels of a locomotive to which the
connecting rods of the engine are attached; -- called
also, simply, driver. See Illust. of Locomotive.
WordNet (r) 3.0 (2006):
n 1: a wheel that drives a motor vehicle (transforms torque into
a tractive force)