- The definition of meridian is at midday or the greatest or highest point.
- An example of meridian used as an adjective is in the phrase a "meridian activity" which means something that is done at noon.
- An example of meridian used as an adjective is in the phrase a "meridian accomplishment" which means the best accomplishment.
- A meridian is defined as a large imaginary circle that passes through two poles, particularly on a globe, or the highest stage of development.
- An example of a meridian is the Prime Meridian.
- An example of a meridian is the height of a civilization.
- of or at noon
- of or passing through the highest point in the daily course of any celestial body
- of or at the highest point of prosperity, splendor, power, etc.
- of or along a meridian
- Rare southern
Origin of meridianOld French meridien from Classical Latin meridianus, of noon, southern from meridies, noon, the south from older medidies from medius, mid + dies, day: see deity
- Archaic the highest apparent point reached by a celestial body in its course
- the highest point of power, prosperity, splendor, etc.; zenith; apex
- the middle period of one's life, regarded as the highest point of health, vigor, etc.; prime
- Obs. noon
- Astron. a great circle passing through the celestial poles, the observer's zenith and nadir, and the horizon's north and south pointsalso called celestial meridian
- a great circle of the earth passing through the geographical poles and any given point on the earth's surface
- either half of such a circle between the poles
- any of the lines of longitude running north and south on a globe or map, representing such a half circle
- Archaic distinctive character as of a particular place
- a. An imaginary great circle on the earth's surface passing through the North and South geographic poles.b. Either half of such a great circle from pole to pole. All points on the same meridian have the same longitude.
- Astronomy A great circle passing through the two poles of the celestial sphere and the zenith of a given observer. Also called celestial meridian . Also called local meridian . Also called vertical circle .
- Mathematics a. A curve on a surface of revolution, formed by the intersection of the surface with a plane containing the axis of revolution.b. A plane section of a surface of revolution containing the axis of revolution.
- Any of the longitudinal lines or pathways on the body along which the acupuncture points are distributed.
- Archaic a. The highest point in the sky reached by the sun or another celestial body; a zenith.b. The time at which the sun reaches its highest point in the sky; noon.
- The highest point or stage of development; peak: “Men come to their meridian at various periods of their lives” ( John Henry Newman )
- Midwestern US See median.
- Of or relating to a meridian; meridional.
- Of or at midday: the meridian hour.
- Of, relating to, or constituting the highest point, as of development or power: the empire in its meridian period.
Origin of meridianMiddle English from Old French midday from Latin merīdiānus of midday from merīdiēs midday from merīdiē at midday alteration of earlier medīdiē from mediei diē mediei dative (locative) of medius middle ; see medhyo- in Indo-European roots. diē dative of diēs day ; see dyeu- in Indo-European roots.
- An imaginary great circle on the Earth's surface, passing through the geographic poles.
- Either half of such a great circle, all points of which have the same longitude.
- (astronomy) A great circle passing through the poles of the celestial sphere and the zenith for a particular observer.
- (mathematics) A similar line on any general surface of revolution.
- (alternative medicine) Any of the pathways on the body along which the vital energy is thought to flow and, therefore, the acupoints are distributed.
- The highest point or state of consciousness and enlightenment achievable by a human.
From Middle English, from Old French, from Latin meridianus (“of or belonging to midday or to the south, southern"), from meridies (“midday, the south"), originally *medidies, from medius (“middle") + diÄ“s (“day").