1) Broadcasting 2) Road haulage 
[broadcasting] In the context of broadcasting, backhaul refers to uncut program content that is transmitted point-to-point to an individual television station or radio station, broadcast network or other receiving entity where it will be integrated into a finished TV show or radio show. The term is independent of the medium being used to se...[telecommunications] In a hierarchical telecommunications network the backhaul portion of the network comprises the intermediate links between the core network, or backbone network and the small subnetworks at the `edge` of the entire hierarchical network. In contracts pertaining to such networks, backhaul is the obligation to carry packets...[trucking] In trucking, a backhaul is a hauling cargo back from point B to the originating point A. Since it costs almost as much time and fuel to drive empty as fully loaded this makes economic sense as it pays for the trip back for the trucker. ...
To haul a shipment back over part of a route which it has already traveled; a marine transportation carrier
(1) Backbone telecommunications pathways used for transporting traffic from central site(s) to distribution sites (viz. local exchanges) to end users, and vice versa. (2) One-to-one uplink feeds to satellite for sending broadcast TV signals to the studio.
A transportation practice used to defray costs by picking up products from a manufacturer after delivering products to a store. 
Network connections from a remote site, such as a mobile base station, to a point of concentration such as an MSC or a BSC.
A deviation to move cargo on the return leg of a voyage for the purpose of minimizing ballast mileage and thereby reducingtransportation costs.