Originally: †the time of noon, reckoned as the ninth hour of the day (see noon, n. 1) (obsolete). In later use: the middle of the day, midday.

The middle of the day; the time when the sun is at its highest point in the sky, noon. Also figurative.

The afternoon; the evening. (In quot. 1450: midday.)

= noontide, n. 1. Also: (U.S.) an interval in the middle of the day; = nooning, n. 2b.

The time when the sun reaches the meridian; twelve o'clock in the day; midday.

The sixth hour of the day; midday. Obsolete.

Midday. Cf. high, adj. 16a.

= undern, n. 2.

Midday, noon. Obsolete (archaic in later use).

Noontime, midday.

Midday, noon.

The middle of the period following undern or the third hour of the day (perhaps about 10.30 a.m. or midday).

The time of full daylight, when the sun is high in the sky. Also attributive, in high-day noon. Cf. high, adj. 16a high noon, n. 1. Now rare.

The time around noon; midday. rare.

The middle of the day; midday. Also figurative.

Midday; noon. In later use also: the middle of the day.

The middle of the day; noon. Obsolete. rare.

Of French, Latin, and Italian words. In form M. (also m.). In astronomical tables, etc.: meridian or meridional; (also more generally following…

a mark, esp. on a window sill, etc., made at the point where the sun is at noon, used to reckon the time; (also) the time of noon, midday.

as postmodifier distinguishing midday from midnight, esp. in twelve noon.

Midday, noon. Also more generally: the time of day when the sun is at its hottest.