mason-dixon line

Ma·son-Dix·on line

M m

Definitions of mason-dixon line words

noun mason-dixon line the boundary between Pennsylvania and Maryland, partly surveyed by Charles Mason and Jeremiah Dixon between 1763 and 1767, popularly considered before the end of slavery as a line of demarcation between free and slave states. 1
noun mason-dixon line US north-south division 1
noun mason-dixon line the state boundary between Maryland and Pennsylvania: surveyed between 1763 and 1767 by Charles Mason and Jeremiah Dixon; popularly regarded as the dividing line between North and South, esp between the free and the slave states before the American Civil War 0
noun mason-dixon line 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 0

before 1770

One of the 46% newest English words

An Americanism dating back to 1770-80

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This term is known only to a narrow circle of people with rare knowledge. Only 2% of English native speakers know the meaning of this word.

According to our data most of word are more popular. This word is almost not used. It has a much more popular synonym.

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