sack3 /sak 
/ ▸ noun [mass noun] historical a dry white wine formerly imported into Britain from Spain and the Canaries: the Poet Laureate traditionally gets a ‘butt of sack’, equivalent to roughly 600 bottles of sherry.
– ORIGIN early 16th century: from the phrase wyne seck, from French vin sec ‘dry wine’.
EnglishOxford Dictionary of English
