Cos'è vehicle? Cos'è vehicle? A device or structure for transporting persons or things; a conveyance: a space vehicle. A self-propelled conveyance that runs on tires; a motor vehicle.A medium through which something is transmitted, expressed, or accomplished: His novels are a vehicle for his political views. The concrete or specific word or phrase that is applied to the tenor of a metaphor and gives the metaphor its figurative power, as walking shadow in "Life's but a walking shadow” ( Shakespeare). A play, role, or piece of music used to display the special talents of one performer or company.A substance of no therapeutic value used to convey an active medicine for administration.A substance, such as oil, in which paint pigments are mixed for application.