Midday; noon.

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.

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.

In the U.S. public land surveying system, a surveyed north-south (i.e. longitudinal) reference line, often hundrends of miles in length, from which ranges are surveyed to the east and west. There are approximately two dozen meridians in the lower 48 states. See also baseline.

Any of 12 channels that are believed to extend over thelength of the body and carry vital energy through the body.

channels through which Chi flows.

the fourteen channels in the body through which qi runs. Acupuncture diagnoses illness by seeking blockages in the body's meridians.

a town in eastern Mississippi

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

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

Hence: The highest point, as of success, prosperity, or the like; culmination.

The meridian at Greenwich. The point from which time and space is measured. It divides longtitude into east and west.