A state in the northern US, bordering on Lakes Superior (in the northwest) and Michigan (in the east); population 5,627,967 (est. 2008); capital, Madison. Ceded to Britain by the French in 1763 and acquired by the US in 1783 as part of the former Northwest Territory, it became the 30th state of the US in 1848.

1Geology
The last (or last two) of the Pleistocene glaciations of North America, approximating to the Weichsel of northern Europe.

1. 1.1The system of deposits laid down during the Wisconsin glaciation.