(figuratively) Ordinary; not special.

A mill operated by tidal currents. / A mill for clearing lands of tide water.

A machine, consisting of a drum that rotates on a horizontal axis, that grinds or pulverizes material mixed with a grinding material such as iron balls.

A small handheld grinder containing a supply of peppercorns for grinding fresh at the table or in the kitchen.

(education, derogatory) A disreputable university, churning out diplomas to unqualified students.

a tumbling mill that grinds or pulverizes materials without contaminating them with iron; used especially for ceramic ingredients

A water mill used for fulling cloth.

A fast-running water-filled channel diverted from a river or stream used to drive a mill wheel.

(mechanical engineering) A machine tool in which a rotating cutter is moved against the workpiece (or vice versa) in order to cut the latter to a desired shape.

Rumor mill.