noun
noon
NOON/nuːn/
Twelve o'clock in the daytime.
The clock shows noon while bright daylight fills the window.

Etymology
“Ninth” referred to the ninth hour of daylight, about 3 p.m., also a designated hour of prayer. The name later shifted to midday, though the reason for that change is uncertain.
In context
promised it for the following day at noon it is now two minutes to twelve in the Department of Commerce building Helen Benson has left her office on a way to lunch
More examples
- Please return your room key by noon.
- We meet for lunch at exactly twelve noon.
- The train leaves ten minutes before noon.
Forms
noon · noons
noonday adjective — Occurring or present in the middle of the day.
Similar words
- midday
- Can mean the middle of the day, not precisely twelve.
- noontime
- Often refers to the period around noon rather than exactly twelve.