1. Conscious perception with full awareness.
2. The process of understanding by which newly observed qualities of an object are related to past experience or prior perceptions.
[New Latin apperceptiō, apperceptiōn- : Latin ad-, ad- + Latin perceptiō, perception; see PERCEPTION.]
ap′per·ceptive (-sĕptĭv) adj.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.