noun (n)

• the latter part of the day (the period of decreasing daylight from late afternoon until nightfall)(noun.time)

  Example:
  He enjoyed the evening light across the lake.
  

  Synonym:
  eve, even, eventide
  

  source: wordnet30
• a later concluding time period(noun.time)

  Example:
  It was the evening of the Roman Empire.
  

  source: wordnet30
• the early part of night (from dinner until bedtime) spent in a special way(noun.time)

  Example:
  An evening at the opera.
  

  source: wordnet30
• The latter part and close of the day, and the beginning of darkness or night; properly, the decline of the day, or of the sun.(noun)

  source: webster1913