1.AdjectiveOf or pertaining to a vehicle or vehicles, usually specifically cars and trucks; involving a vehicle.
"vehicular homicide; Ernest had a fear of vehicular travel, and ended up walking everywhere."
2.AdjectiveThat is used between two groups who do not share a common native tongue nor a common culture.
"vehicular language; English is used as a vehicular language in many business settings.; Latin was a vehicular language for natural philosophers and others from the late Renaissance to the late 18th century."