1. Relating to or exhibiting adaptation.
2. Readily capable of adapting or of being adapted: an adaptive worker; adaptive clothing for children with special needs.
a·daptive·ness, ad′ap·tivi·ty (ăd′ăp-tĭvĭ-tē) n.
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.