Definition of: cavalry

(kav′əl·rē) noun plural ·ries
1. Mobile ground troops, organized in mounted, mechanized, or motorized units.
2. One of the principal arms or branches of the U.S. Army and of other armies.
3. Organized, mounted combat troops.
4. Riders, horsemen, etc., collectively. [<MF cavallerie <Ital. cavalleria <LL caballarius horseman <caballus horse. Doublet of CHIVALRY.]
—cav′al·ry·man (-mən) noun