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1. (Historical Terms) an obligation imposed upon tenants of certain lands requiring them to have their grain ground at a specified mill
2. (Historical Terms) the fee paid for grinding the grain
[C16: variant of earlier thrillage, from thrill, Scottish variant of thrall]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014