noun
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.
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.
The place on the celestial meridian where it is crossed by the sun or a star at its highest point.
A ring or half-ring with markings in which an artificial globe is installed and may spin.
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).
(US, printing, dated) The size of type between double great primer and canon, standardized as 44-point.
The south.
Midday, noon.
A midday rest; a siesta.
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.
An alcoholic drink taken at midday.
verb
(transitive) To cause an object to reach the meridian or highest point of (something).
(intransitive) Of a celestial body: to reach its meridian.
adjective
Relating to a meridian (in various senses); meridional.
(archaic except literary) Relating to midday or noon.
Relating to the culmination or highest point.
Relating to the south; meridional, southern.
noun
(acupuncture, traditional Chinese medicine) 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.