Source : Webster's Revised Unabridged Dictionary (1913)

Evening \E"ven*ing\, n. [AS. [=ae]fnung. See {even}, n., and cf.
   {Eve}.]
   1. The latter part and close of the day, and the beginning of
      darkness or night; properly, the decline of the day, or of
      the sum.

            In the ascending scale Of heaven, the stars that
            usher evening rose.                   --Milton.

   Note: Sometimes, especially in the Southern parts of the
         United States, the afternoon is called evening.
         --Bartlett.

   2. The latter portion, as of life; the declining period, as
      of strength or glory.

   Note: Sometimes used adjectively; as, evening gun. ``Evening
         Prayer.'' --Shak.

   {Evening flower} (Bot.), a genus of iridaceous plants
      ({Hesperantha}) from the Cape of Good Hope, with
      sword-shaped leaves, and sweet-scented flowers which
      expand in the evening.

   {Evening grosbeak} (Zo["o]l.), an American singing bird
      ({Coccothraustes vespertina}) having a very large bill.
      Its color is olivaceous, with the crown, wings, and tail
      black, and the under tail coverts yellow. So called
      because it sings in the evening.

   {Evening primrose}. See under {Primrose}.

   {The evening star}, the bright star of early evening in the
      western sky, soon passing below the horizon; specifically,
      the planet Venus; -- called also {Vesper} and {Hesperus}.
      During portions of the year, Mars, Jupiter, and Saturn are
      also evening stars. See {Morning Star}.

Even \E"ven\, v. t. [imp. & p. p. {Evened}; p. pr. & vb. n.
   {Evening}]
   1. To make even or level; to level; to lay smooth.

            His temple Xerxes evened with the soil. --Sir. W.
                                                  Raleigh.

            It will even all inequalities         --Evelyn.

   2. To equal [Obs.] ``To even him in valor.'' --Fuller.

   3. To place in an equal state, as to obligation, or in a
      state in which nothing is due on either side; to balance,
      as accounts; to make quits. --Shak.

   4. To set right; to complete.

   5. To act up to; to keep pace with. --Shak.

Source : WordNet®

evening
     n 1: the latter part of the day (the period of decreasing
          daylight from late afternoon until nightfall); "he
          enjoyed the evening light across the lake" [syn: {eve},
          {eventide}]
     2: a later concluding time period; "it was the evening of the
        Roman Empire"
     3: the early part of night (from dinner until bedtime) spent in
        a special way; "an evening at the opera"