Meaning of 'meridian'

adjective

being at the best stage of development

Synonyms: prime

adjective

of or happening at noon

Example: "meridian hour"

noun

an imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator

Example: "all points on the same meridian have the same longitude"

Synonyms: line of longitude

noun

the highest level or degree attainable

Synonyms: elevation