In Scoteh law. A servitude by which lands are astricted or “thirled1’ to a particular mill, to which the possessors must carry the grain of the growth of the astricted lands to be ground, for the payf-ment of such duties as are either expressed or Implied in the constitution of the right Ersk. Inst. 2, 9, 18
Source: Black's Law Dictionary 2nd Ed (1910)