pro·gres·siv·i·ty (prō′grĕ-sĭvĭ-tē, prŏg′rĕ-)
n. pl. pro·gres·siv·i·ties
The quality or degree of being progressive: "Proponents of progressivity often argue that higher-income people should pay higher taxes because they benefit more from government" (National Review).
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.