Mason-dixon-line meaning

māsən-dĭksən
A line marking the boundary between the colonies of Pennsylvania and Maryland, established between 1763 and 1767 by the British surveyors Charles Mason (1730–1787) and Jeremiah Dixon (1733–1779). It was regarded as the division between free and slave states before the Civil War.
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(place) Boundary line between Pa. & Md., regarded, before the Civil War, as separating the free states from the slave states or, now, the North from the South.
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