[f. STACK v.1 + -ER1.]
1. One who builds up a stack or pile.
1757. Mrs. Griffith, Lett. Henry & Frances (1767), I. 249. I am, at present, sitting in the midst of a large field of barley, which I reaped the other day, and am taking care of the binders and stackers.
1834. Brit. Husb., I. 494. The common number of workpeople is five hay-makers to each mower, including tedders, loaders, pitchers, and stackers.
1880. [Mary Allan-Olney], New Virginians, I. 180. None of the Virginians working for him were good stackers.
1883. Gresley, Gloss. Coal-mining, 234. Stacker, one who stacks coals, etc.
2. (See quot. 1875.)
1875. Knight, Dict. Mech., Stacker, a machine adapted for delivering straw from the threshing machine on to the stack, or hay from a wagon on to a stack or into a loft.
1887. Sci. Amer., 14 May, 314/1. A hay stacker and loader.
1905. Contemp. Rev., July, 98. There the thresher and stacker has its home and works with long surges of droning sound which I love to hear.