(rail transport) Of rail vehicles, or loads carried on freight vehicles: where dimensions exceed the loading gauge or structure gauge for a particular line or route.
1950 February, “Notes and News: Out-of-Gauge Loads, L.M.R.”, in Railway Magazine, page 140:
During the year 1949, well over 7,500 exceptional and out-of-gauge loads were carried in the London Midland Region of British Railways. Among them were railway coaches for Egypt, locomotives for Ireland, and specially-constructed wagons and large pieces of machinery for various parts of the world.
