Source : Webster's Revised Unabridged Dictionary (1913)

Benediction \Ben`e*dic"tion\, n. [L. benedictio: cf. F.
   b['e]n['e]diction. See {Benison}.]
   1. The act of blessing.

   2. A blessing; an expression of blessing, prayer, or kind
      wishes in favor of any person or thing; a solemn or
      affectionate invocation of happiness.

            So saying, he arose; whom Adam thus Followed with
            benediction.                          --Milton.

            Homeward serenely she walked with God's benediction
            upon her.                             --Longfellow.
      Specifically: The short prayer which closes public
      worship; as, to give the benediction.

   3. (Eccl.) The form of instituting an abbot, answering to the
      consecration of a bishop. --Ayliffe.

   4. (R. C. Ch.) A solemn rite by which bells, banners,
      candles, etc., are blessed with holy water, and formally
      dedicated to God.

Source : WordNet®

benediction
     n 1: the act of praying for divine protection [syn: {blessing}]
     2: a ceremonial prayer invoking divine protection [syn: {blessing}]