Definition of "noonday"

noonday

noun
countable and uncountable, plural noondays
1. The time of noon; the time of day when the sun is highest in the sky, especially on a hot day.
  Quotations
  She should not walk, he said, through the dust and heat of the noonday;Nay, she should ride like a queen, not plod along like a peasant.
  1858, Henry Wadsworth Longfellow, The Courtship of Miles Standish, part 9
2. (figurative) The time of greatest prosperity.