It can refer to:
* The amount of weight or volume being carried: "The truck had a heavy load of cargo."
* The act of placing something into a container: "The workers finished the load of the ship."
* The condition of being burdened: "The load of responsibility was too much for him."
However, depending on the context, the noun form could also be "loading", which refers to the action of loading. For example, "The loading process took several hours."