Source : Webster's Revised Unabridged Dictionary (1913)

Privacy \Pri"va*cy\, n.; pl. {Privacies}. [See {Private}.]
   1. The state of being in retirement from the company or
      observation of others; seclusion.

   2. A place of seclusion from company or observation; retreat;
      solitude; retirement.

            Her sacred privacies all open lie.    --Rowe.

   3. Concealment of what is said or done. --Shak.

   4. A private matter; a secret. --Fuller.

   5. See {Privity}, 2. [Obs.] --Arbuthnot.

Source : WordNet®

privacy
     n 1: the quality of being secluded from the presence or view of
          others [syn: {privateness}, {seclusion}]
     2: the condition of being concealed or hidden [syn: {privateness},
         {secrecy}, {concealment}]

Source : Free On-Line Dictionary of Computing

privacy
     
        Where only the intended recipients can read a message.