The Collaborative International Dictionary of English v.0.48:

Notification \No`ti*fi*ca"tion\, n. [Cf. F. notification. See
   Notify.]
   1. The act of notifying, or giving notice; the act of making
      known; especially, the act of giving official notice or
      information to the public or to individuals, corporations,
      companies, or societies, by words, by writing, or by other
      means.
      [1913 Webster]

   2. Notice given in words or writing, or by signs.
      [1913 Webster]

   3. The writing which communicates information; an
      advertisement, or citation, etc.
      [1913 Webster]

WordNet (r) 3.0 (2006):

notification
    n 1: an accusation of crime made by a grand jury on its own
         initiative [syn: presentment, notification]
    2: informing by words [syn: telling, apprisal,
       notification]
    3: a request for payment; "the notification stated the grace
       period and the penalties for defaulting" [syn:
       notification, notice]