mile·age also mil·age (mīlĭj)
1. Total length, extent, or distance measured or expressed in miles.
2. Total miles covered or traveled in a given time.
3. The amount of service, use, or wear estimated by miles used or traveled: This tire will give very good mileage.
4. The number of miles traveled by a motor vehicle on a given quantity of fuel.
a. An allowance for travel expenses established at a specified rate per mile.
b. Expense per mile, as for the use of a car.
6. Informal The amount of service something has yielded or may yield in the future; usefulness: a tape player that still has a lot of mileage left.
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.