Etymology: Middle English multyr, multer, from Old French molture, literally, grinding, from (assumed) Vulgar Latin molitura, from Latin molitus (past participle of molere to grind) + -ura -ure — more at meal
chiefly Scotland : a fee in the form of money, grain, or meal paid to a land proprietor or a tenant miller for the grinding of grain
Useful english dictionary. 2012.