meridian

meridian is an   Adverb

Definition:

[1] Being at, or pertaining to, midday; belonging to, or passing through, the highest point attained by the sun in his diurnal course. "Meridian hour." Milton. Tables ... to find the altitude meridian. Chaucer.

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

Synonyms: