1A hand-operated device for grinding corn, etc., consisting of two stones, the upper of which is rotated or rubbed on the lower; a quern.
2A simple hand-operated machine or apparatus for grinding or reducing a solid substance other than corn to powder, pulp, etc.; (also) a similar machine or apparatus for squeezing the liquid from fruits, plants, etc., by grinding or crushing.
Early 16th century; earliest use found in 2nd Baron Berners (c1467–1533), soldier, diplomat, and translator. From hand + mill.