Noon n.
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.
High noon, the exact meridian; midday.
Noon of night, midnight. [Poetic] --Dryden.