Of or relating to midday or noon. Often spec. with reference to the position, strength, etc., of the sun at midday. Now chiefly literary.

Of or belonging to midday. Obsolete.

Of, relating to, or characteristic of the middle of the day.

Of or relating to noon or the sun's position at this time; = meridian, adj. 1a. Obsolete.

Of, relating to, or characteristic of the middle of the day. Also figurative.

Probably: = noontide, adj. Obsolete. rare.

Of or relating to midnoon; occurring at midnoon.