1. One who keeps or attends a flour mill or gristmill.
2. A milling machine.
3. (Science: zoology) A moth or lepidopterous insect; so called because the wings appear as if covered with white dust or powder, like a miller's clothes. Called also moth miller. The eagle ray.
The hen harrier. Miller's thumb.
(Science: zoology) A small fresh water fish of the genus Uranidea (formerly Cottus), as the European species (U. Gobio), and the American (U. Gracilis); called also bullhead. A small bird, as the gold-crest, chiff-chaff, and long-tailed tit.