As a noun cavalry is
(military|uncountable) the military arm of service that fights while riding horses.
Not English Wikidiffcom has no English definition. It may be misspelled.
(military, uncountable) The military arm of service that fights while riding horses.
(military, countable) An individual unit of the cavalry arm of service.
(military, countable) The branch of the military transported by fast light vehicles, also known as mechanized cavalry.
* heavy cavalry
* light cavalry
* mechanized cavalry
* Delamarre, X. & Lambert, P. -Y. (2003). Dictionnaire de la langue gauloise : Une approche linguistique du vieux-celtique continental (2nd ed.). Paris: Errance. ISBN
978 2 87772 369 5, ISBN 2 87772 237 6