vehicle

n.

  1. That in or on which any person or thing is, or may be, carried, as a coach, carriage, wagon, cart, car, sleigh, bicycle, etc.; a means of conveyance; specifically, a means of conveyance upon land.
  2. That which is used as the instrument of conveyance or communication; as, matter is the vehicle of energy.
  3. A substance in which medicine is taken.
  4. Any liquid with which a pigment is applied, including whatever gum, wax, or glutinous or adhesive substance is combined with it.