1. Having an unknown or unacknowledged name: an anonymous author.
2. Having an unknown or withheld authorship or agency: an anonymous letter.
3. Having no distinctive character or recognition factor: "They were carried over a bridge above an anonymous parade of shops" (Elizabeth Speller).
[From Late Latin anōnymus, from Greek anōnumos, nameless : an-, without; see A-1 + onuma, name (influenced by earlier nōnumnos, nameless); see n-men- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.