Dictionary.net

• A ferry-boat; a tub used in brewing and distilling.

1914 - Nuttall's Standard dictionary of the English language
By Nuttall, P.Austin.

• A brewers vat or large open tub for containing beer; a ferry-boat.

1874 - Etymological and pronouncing dictionary of the English language
By Stormonth, James, Phelp, P. H.