Available Definitions:
1) a. - No. See the Note under No.
2) n. - The middle of the day; midday; the time when the sun is in the meridian; twelve o'clock in the daytime.
3) n. - Hence, the highest point; culmination.
4) a. - Belonging to midday; occurring at midday; meridional.
5) v. i. - To take rest and refreshment at noon.