noun (n)

• the time after sunrise and before sunset while it is light outside(noun.time)

  Synonym:
  day, daytime
  Antonym:
  dark, night, nighttime
  

  source: wordnet30
• light during the daytime(noun.phenomenon)

  source: wordnet30
• The light of day as opposed to the darkness of night; the light of the sun, as opposed to that of the moon or to artificial light.(noun)

  source: webster1913