The Collaborative International Dictionary of English v.0.48:

Private \Pri"vate\ (?; 48), a. [L. privatus apart from the
   state, peculiar to an individual, private, properly p. p. of
   privare to bereave, deprive, originally, to separate, fr.
   privus single, private, perhaps originally, put forward
   (hence, alone, single) and akin to prae before. See Prior,
   a., and cf. Deprive, Privy, a.]
   1. Belonging to, or concerning, an individual person,
      company, or interest; peculiar to one's self; unconnected
      with others; personal; one's own; not public; not general;
      separate; as, a man's private opinion; private property; a
      private purse; private expenses or interests; a private
      secretary.
      [1913 Webster]

   2. Sequestered from company or observation; appropriated to
      an individual; secret; secluded; lonely; solitary; as, a
      private room or apartment; private prayer.
      [1913 Webster]

            Reason . . . then retires
            Into her private cell when nature rests. --Milton.
      [1913 Webster]

   3. Not invested with, or engaged in, public office or
      employment; as, a private citizen; private life. --Shak.
      [1913 Webster]

            A private person may arrest a felon.  --Blackstone.
      [1913 Webster]

   4. Not publicly known; not open; secret; as, a private
      negotiation; a private understanding.
      [1913 Webster]

   5. Having secret or private knowledge; privy. [Obs.]
      [1913 Webster]

   Private act or Private statute, a statute exclusively for
      the settlement of private and personal interests, of which
      courts do not take judicial notice; -- opposed to a
      general law, which operates on the whole community. In
      the United States Congress, similar private acts are
      referred to as private law and a general law as a
      public law.

   Private nuisance or wrong. See Nuisance.

   Private soldier. See Private, n., 5.

   Private way, a right of private passage over another man's
      ground; also, a road on private land, contrasted with
      public road, which is on a public right of way. --Kent.
      [1913 Webster +PJC]

WordNet (r) 3.0 (2006):

private nuisance
    n 1: a nuisance that interferes with your interest in and
         private use and enjoyment of your land