a piece of land on which a flour mill was or could be built; specifically, a lot granted to a person who undertook to build and operate a flour mill there.
See also: mill site
- 1763  (1876)  . . . the Land [is] Granted to John Charles for a mill lot.
- 1804  They will sell . . . The Mill and Mill Lot . . . equal to manufacture 50 to 60,000 minots of wheat annually. . . .