A union of German states for uniformity of customs, established in 1819. It continued until the unification of the German empire, including Prussia, Saxony, Bavaria, wnrtemberg, Baden, Hesse-Cassel, Brunswick, and Mecklenburg-Strelitz, and all intermediate principalities. It has-now been superseded by the German empire;. and the federal council of the empire has taken the place of that of the Zoll-Vereln. wharton
Source: Black's Law Dictionary 2nd Ed (1910)