Source : Webster's Revised Unabridged Dictionary (1913)

Vehicular \Ve*hic"u*lar\, a. [L. vehicularis: cf. F.
   v['e]hiculaire.]
   Of or pertaining to a vehicle; serving as a vehicle; as, a
   vehicular contrivance.

Source : WordNet®

vehicular
     adj : of or relating to or intended for (motor) vehicles;
           "vehicular traffic"