MERIDIAN

Definition

1. adjective of or happening at noon.
2. adjective being at the best stage of development. — synonyms: prime
3. noun the highest level or degree attainable. — synonyms: acme, height, elevation, peak, pinnacle, summit, superlative, tiptop
4. noun a town in eastern Mississippi.
5. noun an imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator. — synonyms: line_of_longitude