rev (rĕv) Informal
A revolution, as of a motor.
v. revved, rev·ving, revs
a. To increase the speed of (a motor, for example): revved the engine.
b. To accelerate or increase: orders to rev up factory output.
2. To make livelier or more productive: revving ourselves up for the game; efforts to rev the economy.
1. To operate at an increased speed: heard the motors revving.
2. To accelerate in quantity or activity.
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.