1. A weathervane, especially one in the form of a rooster.
2. One that is very changeable or fickle.
intr.v. weath·er·cocked, weath·er·cock·ing, weath·er·cocks
To have a tendency to veer in the direction of the wind. Used of an aircraft or a missile.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 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.