Meaning & use
meridian
An imaginary circle on the Earth's surface passing through the North and South Poles, used to measure longitude.
See it in a sentence
The Prime Meridian, which passes through Greenwich, England, marks zero degrees longitude.
Ships once used the position of the sun relative to the meridian to calculate their location.
A note on using this word
Meridian can also refer to the highest point reached by a person's career or life, as in "the meridian of his success," and to an energy pathway in traditional Chinese medicine.
Words with a similar meaning
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