wagonload noun4 •The amount that can be loaded onto a wagon.The countryside through which the line passes grows some beet, too. Ten wagonloads a day are despatched from Fethard and smaller quantities from Farranaleen, Laffan's Bridge and Horse & Jockey. — 1957 •The load of a wagon. •(informal) A very large amount. •A type of freight train service in which individual wagons have separate destinations and/or cargos.This firm regularly consigns margarine in palletised wagon-loads to a wide variety of destinations. — 1961 formswagonloads