Meaning

• The ninth hour of the day counted from sunrise; around three o'clock in the afternoon.

• Time of day when the sun is in its zenith; twelve o'clock in the day, midday.

• The corresponding time in the middle of the night; midnight.

  "1885, When night was at its noon I heard a voice chanting the Koran in sweetest accents — Sir Richard Burton, The Book of the Thousand Nights and One Night, Night 17:"

• The highest point; culmination.

Meaning

• To relax or sleep around midday