Definition of apperceptions:
(n) :
(uncountable) Psychological or mental perception; recognition.
(n) :
(countable, psychology) The general process or a particular act of mental assimilation of new experience into the totality of one's past experience.
(n) :
(uncountable, psychology and philosophy, especially Kantianism) The mind's perception of itself as the subject or actor in its own states, unifying past and present experiences; self-consciousness, perception that reflects upon itself.