run·off (rŭnôf′, -ŏf′)
a. Water, such as rainfall, and any sediments or other substances carried with it, that is not absorbed by the soil but instead flows away over the ground.
b. The overflow of fluid from a container.
2. An extra election or competition held to decide a winner following an earlier, inconclusive election or competition.
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.