Definition of "large-scale"

Moreover, in view of the lamentable present indecision of the Government in regard to electrification, the large-scale building of diesel power may prove to have been a farseeing move after all.

1961 February, Cecil J. Allen, “Locomotive Running Past and Present”, in Trains Illustrated, page 86

The production of railway timetables is a large-scale and expensive operation.

1964 March, “Timetable confusion”, in Modern Railways, page 145