1. A fire of great size and intensity that generates and is fed by strong inrushing winds from all sides: the firestorm that leveled Hiroshima after the atomic blast.
2. An intense or violent response: "The discovery that your child has a learning disorder can set off a firestorm of emotions" (Judith Harkness Richardson).
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.