Definitions

1. noun

A great circle on the Earth’s surface, especially one of the imaginary lines that run from the North Pole to the South Pole, used as a basis for measuring longitude or defining time zones.

“The ship sailed along the 45th meridian.”

2. noun

A maximum or best point in a series of observations, measurements, or activities.

“The team reached their meridian in the competition and decided to slow down.”

3. noun

A point in the sky, especially the point where the sun, moon, or stars are highest in the sky.

“The meridian of the sun was at its highest point at noon.”

4. adjective

Relating to a meridian or situated on a meridian.

“The meridian city was a major hub for trade and commerce.”