trainload noun2 •The amount that can be transported by a train.On February 14, Mr. S. F. Sanders observed two trainloads of football supporters from Bolton which were conveyed to Luton by Nos. 45710, Irresistible, and 45712, Victory, respectively. — 1953 •A large amount.You just bought yourself a trainload of trouble. I think you're now in over your head. formstrainloads