The Collaborative International Dictionary of English v.0.48:

Camera \Cam"e*ra\, n.; pl. E. Cameras, L. Camerae. [L.
   vault, arch, LL., chamber. See Chamber.]
   A chamber, or instrument having a chamber. Specifically: The
   camera obscura when used in photography. See Camera, and
   Camera obscura.
   [1913 Webster]

   Bellows camera. See under Bellows.

   In camera (Law), in a judge's chamber, that is, privately;
      as, a judge hears testimony which is not fit for the open
      court in camera.

   Panoramic camera, or Pantascopic camera, a photographic
      camera in which the lens and sensitized plate revolve so
      as to expose adjacent parts of the plate successively to
      the light, which reaches it through a narrow vertical
      slit; -- used in photographing broad landscapes. --Abney.
      [1913 Webster]

WordNet (r) 3.0 (2006):

in camera
    adv 1: kept private or confined to those intimately concerned;
           "it was discussed privately between the two men";
           "privately, she thought differently"; "some member of his
           own party hoped privately for his defeat"; "he was
           questioned in private" [syn: privately, in private,
           in camera] [ant: in public, publically, publicly]