fli·er also fly·er (flīər)
1. One, such as an insect or bird, that flies with wings.
2. The pilot of an aircraft.
3. A passenger in an aircraft: special fares for business fliers.
4. A pamphlet or circular for mass distribution.
5. A step in a straight stairway.
6. Informal A daring venture.
7. often flyer
a. Australian A female kangaroo.
b. Australian An exceptionally swift kangaroo.
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.