an organization, usually commercial or governmental, providing transportation by airplane for freight or passengers. The term includes the organization, its personnel, equipment and other properties, such as approved air routes.

A concern operating transport aircraft over an air route.

a commercial enterprise that provides scheduled flights for passengers

Airline is a British and later, American television reality show that showcases the daily happenings of passengers, ground workers and on-board staff members of Britannia and later easy Jet. The show has been shown since 1998 on ITV1 and on syndication on Sky Travel. From time to time, ITV shows the American version of Airline, which they call Airline USA.