carrier  is the generic term for any company that transports passengers and/or freight


Other definition:
Carrier is a company that deals in the transporting of passengers or goods.

Other definition:
Carrier is the company that transports passengers or freight.

Other definition:
Carrier is any provider of mass transportation, usually used in reference to an airline.

Other definition:
Carrier is a company that provides transportation services, such as motorcoach companies, airlines, cruise lines, and rental car agencies