head-on (hĕdŏn′, -ôn′)
1. With the head or front first: The cars crashed head-on.
2. In open conflict; in direct opposition: "I have wondered since whether it would have been wiser to meet the issue head-on" (Henry A. Kissinger).
1. Facing forward; frontal.
2. With the front end foremost: a head-on collision.
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.