(a.) Being at, or pertaining to, midday; belonging to, or
passing through, the highest point attained by the sun in his diurnal
course.
(a.) Pertaining to the highest point or culmination; as,
meridian splendor.
(a.) Midday; noon.
(a.) Hence: The highest point, as of success, prosperity, or
the like; culmination.
(a.) 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.) 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.
