The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
- A philosophical system developed at Alexandria in the third century A.D. by Plotinus and his successors. It is based on Platonism with elements of mysticism and some Judaic and Christian concepts and posits a single source from which all existence emanates and with which an individual soul can be mystically united.
- A revival of Neo-Platonism or a system derived from it, as in the Middle Ages.
- Neˌo-Pla·tonˈic adjective
- Neˌo-Plaˈto·nist noun