1. A woman who is mentally deranged.
2. A woman who behaves in a violently destructive way: a madwoman who stabbed several people on a bus.
3. A woman who behaves in an energetic, uncontrolled way: a madwoman on the drums; is a madwoman when driving during rush-hour traffic.
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.