Vehicle

noun

1. A conveyance; a device for carrying or transporting substances, objects or individuals.
2. A medium for expression of talent or views.
3. A liquid content (e.g. oil) which acts as a binding and drying agent in paint. (FM 55-501).
4. (pharmaceuticals) The main excipient (such as an oil or gel) that conveys the active ingredient of a drug.
5. An entity to achieve an end.