From WordNet (r) 3.0 (2006):
loading
n 1: weight to be borne or conveyed [syn: load, loading,
burden]
2: a quantity that can be processed or transported at one time;
"the system broke down under excessive loads" [syn: load,
loading]
3: the ratio of the gross weight of an airplane to some factor
determining its lift
4: goods carried by a large vehicle [syn: cargo, lading,
freight, load, loading, payload, shipment,
consignment]
5: the labor of putting a load of something on or in a vehicle
or ship or container etc.; "the loading took 2 hours" [ant:
unloading]