n. (in the US) the boundary between Maryland and Pennsylvania, taken as the northern limit of the slave-owning States before the abolition of slavery.
Etymology: C. Mason & J. Dixon, 18th-c. English astronomers who surveyed it
n. (in the US) the boundary between Maryland and Pennsylvania, taken as the northern limit of the slave-owning States before the abolition of slavery.
Etymology: C. Mason & J. Dixon, 18th-c. English astronomers who surveyed it
Oxford English vocab. Оксфордский английский словарь. 2012