Carrier

Definition from Nolo’s Plain-English Law Dictionary

Any business that transports property or people by any means of conveyance (truck, auto, taxi, bus, airplane, railroad, ship) for a charge. There are two types of carriers: common carrier (in the regular business of providing transport) and a private carrier (a party not in the business, but agrees to make a delivery or carry a passenger in a specific instance).

Definition provided by Nolo’s Plain-English Law Dictionary.