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• meridian
  meridian

  noun
• Meridian
  Meridian

  noun

  a city in E Mississippi.

meridian

¹ American  

[muh-rid-ee-uhn] / məˈrɪd i ən /

noun

meridians plural

1. Geography.

   1. a great circle of the earth passing through the poles and any given point on the earth's surface.

   2. the half of such a circle included between the poles.

2. Astronomy. the great circle of the celestial sphere that passes through its poles and the observer's zenith.

3. a point or period of highest development, greatest prosperity, or the like.

4. (in acupuncture) any of the pathways in the body along which vital energy flows.

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adjective

1. of or relating to a meridian.

2. of or relating to midday or noon.

   the meridian hour.

3. of or indicating a period of greatest prosperity, splendor, success, etc.

Meridian ² American  

[muh-rid-ee-uhn] / məˈrɪd i ən /

noun

1. a city in E Mississippi.

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meridian British  

/ məˈrɪdɪən /

noun

1. 1. one of the imaginary lines joining the north and south poles at right angles to the equator, designated by degrees of longitude from 0° at Greenwich to 180°

   2. the great circle running through both poles See prime meridian

2. astronomy

   1. the great circle on the celestial sphere passing through the north and south celestial poles and the zenith and nadir of the observer

   2. ( as modifier )

      a meridian instrument

3. Also called: meridian section.  maths a section of a surface of revolution, such as a paraboloid, that contains the axis of revolution

4. the peak; zenith

   the meridian of his achievements

5. (in acupuncture, etc) any of the channels through which vital energy is believed to circulate round the body

6. obsolete noon

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adjective

1. along or relating to a meridian

2. of or happening at noon

3. relating to the peak of something

meridian Cultural  

1. A great imaginary circle on the surface of the Earth that runs north and south through the North Pole and South Pole. Longitude is measured on meridians: places on a meridian have the same longitude. (See prime meridian.)

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Other Word Forms

Noun Inflected Forms

• meridians
  plural

Etymology

Origin of meridian

1350–1400; Middle English < Latin merīdiānus of noon, equivalent to merīdi ( ēs ) midday (formed from the locative merīdiē at midday, by dissimilation < *medī diē; medius mid ¹, diēs day) + -ānus -an

Explanation

The word meridian describes a gigantic imaginary circle that runs north and south on the earth's surface, from the North Pole to the South Pole. If you stood on the meridian at the North Pole, you would be at the earth's northernmost point. Meridian can also refer to the highest stage of development. The meridian of your chess career may have been when you took out the champ from a rival school. Used as an adjective, meridian can describe something that's at the best stage of development. Your favorite skater was at his meridian form when he won the Olympic gold medal. Meridian can also describe something that takes place at noon, like your meridian boat voyage that launched precisely at noon.

Example Sentences

See Examples For:

meridian Meridian meridians

The route from New York to Istanbul to Santiago would have tacked on two unnecessary crossings of the prime meridian.

From Slate ● Sep. 26, 2024

Since early September, they had logged nearly 12,000 miles aboard the Offshore Surveyor, crisscrossing the equator near the 180th meridian.

From Los Angeles Times ● Mar. 13, 2024

An image of Jupiter 30 minutes after it crossed the meridian was taken from Singapore by Marco Lorenzi.

From BBC ● Sep. 14, 2023

He disappeared behind the weeds covering the steep embankment of the meridian.

From Seattle Times ● Aug. 1, 2023

The Distracted Globe was located at the western-hemisphere intersection of the Boulevard and the Avenue, two brightly lit streets that stretched completely around the planet along its equator and prime meridian.

From "Ready Player One: A Novel" by Ernest Cline

On Friday morning, several people sat by the restored cascading fountain at Meridian Hill Park.

From Los Angeles Times ● Jun. 8, 2026

Fountains in Sheridan Circle, Meridian Park and Columbus Circle – among more than a dozen others - have been repaired.

From BBC ● Jun. 1, 2026

He explains how Meridian Hill Park was historically a place for the city's Black community to gather, and still is, despite rapid gentrification of the area.

From Barron's ● May 19, 2026

Nicole Coates, 39, of Meridian, Idaho, feels God asked her to speak up about her estrangement from her eldest child, who is 22, to help other estranged mothers and fathers feel less stigmatized.

From The Wall Street Journal ● Dec. 13, 2025

Wishes he’d thought to grab his map so he could add a drawing of the marquee over Meridian just for something to do.

From "Clean Getaway" by Nic Stone

“A central credo in TCM is that blockages in meridians lead to imbalances in health, including illness or pain,” Ko said.

From Los Angeles Times ● Jul. 17, 2024

Mapmakers long chose their own east-west dividing lines, which are called meridians, a word derived from the Latin for “midday.”

From New York Times ● Apr. 24, 2024

"It's a mutual, joint-stock world, in all meridians," Ishmael imagines Queequeg saying at one point in the novel.

From Salon ● Dec. 11, 2021

Acupuncture’s specialized needle placements restore the balance of yin and yang by reducing disruptions along the meridians, improving the flow of qi and promoting healing.

From Washington Post ● Oct. 3, 2021

Taisin remembered how it felt to bend the meridians of energy to her will: like she was invincible.

From "Huntress" by Malinda Lo