Meaning of “meridian” in the English Dictionary

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"meridian" in British English

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(Definition of “meridian” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"meridian" in American English

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meridiannoun [ C ]

us /məˈrɪd·i·ən/

earth science an imaginary line that passes from the North Pole to the South Pole through any place on the surface of the earth, used to show the position of places on a map

(Definition of “meridian” from the Cambridge Academic Content Dictionary © Cambridge University Press)