A fee or tax paid to a fulling mill for the processing of cloth, or the process itself of fulling.
From 'full' (to clean and thicken cloth) plus Old English suffix '-age' (meaning a process, fee, or collective noun), used in Medieval commerce for textile fees.
Fullage was literally the price of making cloth wearable—before machines, fullers charged by the yard for trampling cloth in water and soap to felt and thicken it, and that fee is 'fullage.'
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