- (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.
- (uncountable) Psychological or mental perception; recognition.
2009, Adam Roberts, Yellow Blue Tibia:
- For as she smiled I was gifted a glimpse past the apperception of an anonymous spherical quantity of human flesh; and into the individual.
- (countable, psychology) The general process or a particular act of mental assimilation of new experience into the totality of one's past experience.
mind’s perception of itself as subject
mental assimilation of new experience
- “apperception” in Noah Webster, An American Dictionary of the English Language, volume I (A–I), 1st edition, New York, N.Y.: Published by S. Converse; printed by Hezekiah Howe, New Haven, 1828, OCLC 999480247.
- apperception in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913
- “apperception” in Dictionary.com Unabridged, Dictionary.com, LLC, 1995–.
- “apperception” in Microsoft's Encarta World English Dictionary, North American Edition (2007)
- "apperception" in Encyclopedia Britannica, 1911 ed.
- Oxford English Dictionary, second edition (1989)
- Random House Webster's Unabridged Electronic Dictionary (1987-1996)
- Dictionary of Philosophy, Dagobert D. Runes (ed.), Philosophical Library, 1962. See: "Apperception" by Otto F. Kkraushaar, p. 15.