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Multiple Meanings

meridian hour
one of many imaginary lines between the north and south pole that are used to establish position (longitude)

More rarely, meridian can refer to a similar imaginary line in astronomy or mathematics. Even more rarely, it can refer to a highest point, to noon, or to acupuncture points.

In the Midwest, meridian can refer to a highway median (a strip of land that separate highway lanes going in opposite directions).
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