pre·par·a·to·ry (prĭ-părə-tôr′ē, -pâr-, prĕpər-ə-)
1. Serving to make ready or prepare; introductory. See Synonyms at preliminary.
2. Relating to or engaged in study or training that serves as preparation for advanced education: a preparatory course; preparatory students.
In preparation for. Used with to: thoroughly cleaned the house preparatory to our departure.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. 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.