Webster's Revised Unabridged Dictionary · 1913

Noon

Noon (nōn) , adjective

No. See the Note under No. [Obsolete]

Noon (non) , noun

[Anglo-Saxon nōn, orig., the ninth hour, from Latin nona (sc. hora) the ninth hour, then applied to the church services (called nones) at that hour, the time of which was afterwards changed to noon. See Nine, and compare Nones, Nunchion.]

1.
The middle of the day; midday; the time when the sun is in the meridian; twelve o'clock in the daytime.
2.
Hence, the highest point; culmination.
In the very noon of that brilliant life which was destined to be so soon, and so fatally, overshadowed. — Motley
Collocations (2)
High noon , the exact meridian; midday.
Noon of night , midnight. [Poetic] — Dryden

Noon , adjective

Belonging to midday; occurring at midday; meridional. — Young

Noon , intransitive verb

To take rest and refreshment at noon.