The Collaborative International Dictionary of English v.0.48:

Privacy \Pri"va*cy\, n.; pl. Privacies. [See Private.]
   1. The state of being in retirement from the company or
      observation of others; seclusion.
      [1913 Webster]

   2. A place of seclusion from company or observation; retreat;
      solitude; retirement.
      [1913 Webster]

            Her sacred privacies all open lie.    --Rowe.
      [1913 Webster]

   3. Concealment of what is said or done. --Shak.
      [1913 Webster]

   4. A private matter; a secret. --Fuller.
      [1913 Webster]

   5. See Privity, 2. [Obs.] --Arbuthnot.
      [1913 Webster]

WordNet (r) 3.0 (2006):

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

The Free On-line Dictionary of Computing (19 January 2023):

privacy
private

    An attribute of a system's security that ensures
   that only intended or desired people or bodies can read a
   message or piece of stored data.  Privacy is often enforced by
   some kind of access control or encryption.

   (2011-06-03)