The Collaborative International Dictionary of English v.0.48:

Noonday \Noon"day`\, n.
   Midday; twelve o'clock in the day; noon.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Noonday \Noon"day`\, a.
   Of or pertaining to midday; meridional; as, the noonday heat;
   only mad dogs and Englishmen go out in the noonday sun.
   "Noonday walks." --Addison.
   [1913 Webster +PJC]

WordNet (r) 3.0 (2006):

noonday
    n 1: the middle of the day [syn: noon, twelve noon, high
         noon, midday, noonday, noontide]

U.S. Gazetteer Places (2000):

Noonday, TX -- U.S. city in Texas
   Population (2000):    515
   Housing Units (2000): 222
   Land area (2000):     1.991712 sq. miles (5.158510 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.991712 sq. miles (5.158510 sq. km)
   FIPS code:            51756
   Located within:       Texas (TX), FIPS 48
   Location:             32.245210 N, 95.392567 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Noonday, TX
    Noonday