cask /kɑːsk $ kæsk/ BrE AmE noun [countable]
[ Date: 1500-1600 ; Language: French ; Origin: casque 'helmet' , from Spanish casco 'broken piece of a pot, skull, helmet' , from cascar 'to break' ]
a round wooden container used for storing wine or other liquids, or the amount of liquid that it contains SYN barrel :
a cask of rum