1. A naval unit smaller than a fleet.
2. An armored cavalry unit subordinate to a regiment and consisting of two or more troops.
3. A cavalry or armored unit of a European army, corresponding to a company.
4. A basic tactical air force unit, subordinate to a group and consisting of two or more flights.
5. A multitude or horde: "Squadrons of flies like particles of dust danced up and down" (T.E. Lawrence).
[Italian squadrone, augmentative of squadra, squad; see SQUAD.]
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.