1. Retired or ineffective because of advanced age: "Nothing is more tiresome than a superannuated pedagogue" (Henry Adams).
2. Outmoded; obsolete: superannuated laws.
[From Medieval Latin superannuātus, over one year old : Latin super-, super- + Latin annus, year; see at- in the Appendix of Indo-European roots.]
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.