Simple Definition of meridian

from our Learner's Dictionary

meridian

noun

məˈrɪdijən

plural meridians

: any one of the lines that go from the North Pole to the South Pole on maps of the world

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“Meridian.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/meridian. Accessed 20 Jun. 2026.

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