# Meridian vs. Longitude — What's the Difference?

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## Definitions

#### Meridian➦

An imaginary great circle on the earth's surface passing through the North and South geographic poles.

#### Longitude➦

Longitude (, AU and UK also ) is a geographic coordinate that specifies the east–west position of a point on the Earth's surface, or the surface of a celestial body. It is an angular measurement, usually expressed in degrees and denoted by the Greek letter lambda (λ).

#### Meridian➦

Either half of such a great circle from pole to pole. All points on the same meridian have the same longitude.

#### Longitude➦

Angular distance on the earth's surface, measured east or west from the Prime Meridian at Greenwich, England, to the meridian passing through a position, expressed in degrees (or hours), minutes, and seconds.

#### Meridian➦

(Astronomy)A great circle passing through the two poles of the celestial sphere and the zenith of a given observer.Also called celestial meridian, local meridian, vertical circle.

#### Longitude➦

Celestial longitude.
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#### Meridian➦

A curve on a surface of revolution, formed by the intersection of the surface with a plane containing the axis of revolution.

#### Longitude➦

(geography) Angular distance measured west or east of the prime meridian.

#### Meridian➦

A plane section of a surface of revolution containing the axis of revolution.

#### Longitude➦

Any imaginary line perpendicular to the equator and part of a great circle passing through the North Pole and South Pole.

#### Meridian➦

Any of the longitudinal lines or pathways on the body along which the acupuncture points are distributed.

#### Longitude➦

(archaic) Length.
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#### Meridian➦

The highest point in the sky reached by the sun or another celestial body; a zenith.

#### Longitude➦

Length; measure or distance along the longest line; - distinguished from breadth or thickness; as, the longitude of a room; rare now, except in a humorous sense.
The longitude of their cloaks.
Mine [shadow] spindling into longitude immense.

#### Meridian➦

The time at which the sun reaches its highest point in the sky; noon.

#### Longitude➦

The arc or portion of the equator intersected between the meridian of a given place and the meridian of some other place from which longitude is reckoned, as from Greenwich, England, or sometimes from the capital of a country, as from Washington or Paris. The longitude of a place is expressed either in degrees or in time; as, that of New York is 74° or 4 h. 56 min. west of Greenwich.

#### Meridian➦

The highest point or stage of development; peak:"Men come to their meridian at various periods of their lives"(John Henry Newman).

#### Longitude➦

The distance in degrees, reckoned from the vernal equinox, on the ecliptic, to a circle at right angles to the ecliptic passing through the heavenly body whose longitude is designated; as, the longitude of Capella is 79°.

#### Meridian➦

Midwestern US See median.

#### Longitude➦

An imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator;
All points on the same meridian have the same longitude

#### Meridian➦

Of or relating to a meridian; meridional.

#### Meridian➦

Of or at midday:the meridian hour.

#### Meridian➦

Of, relating to, or constituting the highest point, as of development or power:the empire in its meridian period.

#### Meridian➦

Relating to a meridian (in various senses); meridional.

#### Meridian➦

Relating to midday or noon.

(obsolete)

#### Meridian➦

Relating to the culmination or highest point.

#### Meridian➦

Relating to the south; meridional, southern.

(astronomy)

#### Meridian➦

In full celestial meridian: a great circle passing through the poles of the celestial sphere and the zenith for a particular point on the Earth's surface.

#### Meridian➦

In full terrestrial meridian: a great circle on the Earth's surface, passing through the geographic poles (the terrestrial North Pole and South Pole); also, half of such a circle extending from pole to pole, all points of which have the same longitude.

(by extension)

#### Meridian➦

The place on the celestial meridian where it is crossed by the sun or a star at its highest point.

#### Meridian➦

A ring or half-ring with markings in which an artificial globe is installed and may spin.

#### Meridian➦

(mathematics) A line passing through the poles of any sphere; a notional line on the surface of a curved or round body (in particular, an eyeball).

#### Meridian➦

The size of type between double great primer and canon, standardized as 44-point.

(obsolete)

The south.

Midday, noon.

#### Meridian➦

A midday rest; a siesta.

#### Meridian➦

A particular area or situation considered as having a specific characteristic or identity; also, the characteristics, habits, or tastes of a specific group, locale, etc.

#### Meridian➦

(Scotland) An alcoholic drink taken at midday.

#### Meridian➦

Any of the pathways on the body along which chi or qi (life force) is thought to flow and, therefore, the acupoints are distributed; especially, one of twelve such pathways associated with organs of the body.

#### Meridian➦

(transitive) To cause an object to reach the meridian or highest point of (something).

#### Meridian➦

(intransitive) Of a celestial body: to reach its meridian.

#### Meridian➦

Being at, or pertaining to, midday; belonging to, or passing through, the highest point attained by the sun in his diurnal course.
Tables . . . to find the altitude meridian.

#### Meridian➦

Pertaining to the highest point or culmination; as, meridian splendor.

Midday; noon.

#### Meridian➦

Hence: The highest point, as of success, prosperity, or the like; culmination.
I have touched the highest point of all my greatness,And from that full meridian of my gloryI haste now to my setting.

#### Meridian➦

A great circle of the sphere passing through the poles of the heavens and the zenith of a given place. It is crossed by the sun at midday.

#### Meridian➦

A great circle on the surface of the earth, passing through the poles and any given place; also, the half of such a circle included between the poles.
All other knowledge merely serves the concerns of this life, and is fitted to the meridian thereof.

#### Meridian➦

A town in eastern Mississippi

#### Meridian➦

An imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator;
All points on the same meridian have the same longitude

#### Meridian➦

Of or happening at noon;
Meridian hour