'Cavalry' definitions:

Definition of 'cavalry'

From: WordNet
noun
Troops trained to fight on horseback; "500 horse led the attack" [syn: cavalry, horse cavalry, horse]
noun
A highly mobile army unit

Definition of 'Cavalry'

From: GCIDE
  • Cavalry \Cav"al*ry\, n. [F. cavalerie, fr. It. cavalleria. See Cavalier, and cf. chivalry.] (Mil.) That part of military force which serves on horseback. [1913 Webster]
  • Note: Heavy cavalry and light cavalry are so distinguished by the character of their armament, and by the size of the men and horses. [1913 Webster]