The Collaborative International Dictionary of English v.0.48:

Cavalcade \Cav"al*cade`\, n. [F. cavalcade, fr. It. cavalcata,
   fr. cavalcare to go on horseback, fr. LL. caballicare, fr. L.
   caballus an inferior horse, Gr. ?. Cf. Cavalier,
   Cavalry.]
   A procession of persons on horseback; a formal, pompous march
   of horsemen by way of parade.
   [1913 Webster]

         He brought back war-worn cavalcade to the city.
                                                  --Prescott.
   [1913 Webster] Cavalero

WordNet (r) 3.0 (2006):

cavalcade
    n 1: a procession of people traveling on horseback