1. The act of combining or the state of being combined.
2. The result of combining.
3. An alliance of persons or parties for a common purpose; an association.
4. A sequence of numbers or letters used to open a combination lock.
5. Mathematics One or more elements selected from a set without regard to the order of selection.
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.