rolling mill

plural rolling mills

1. A machine or group of machines for rolling metal (especially steel) into semifinished or finished shapes, such as beams, plate, or sheet; the entire associated plant (e.g., machinery, buildings, railyards).

   1 more example

   Besides the usual run of machines, planers, millers, automatics, centre lathes, cranes, etc., there were several power stations, the rolling mills for strip material and for 60 ft. rails, and all the steel furnaces with their complicated systems of flues. If variety is the spice of life, then there was plenty here.

   1944 November and December, A Former Pupil, “Some Memories of Crewe Works—II”, in Railway Magazine, page 341

2. A roller mill (for grain).