\Ap`per*cep"tion\, n. [Pref. ad- + perception: cf.
F. apperception.] (Metaph.)
The mind's perception of itself as the subject or actor in
its own states; perception that reflects upon itself;
sometimes, intensified or energetic perception. --Leibnitz.
Reid.

      This feeling has been called by philosophers the
      apperception or consciousness of our own existence.
                                               --Sir W.
                                               Hamilton.