cavalryEnglishOxford American Thesauruscavalry plural noun 1 the cavalry charged up the hill: mounted troops, cavalrymen, horse soldiers, troopers, horse; dragoons, lancers, hussars, carabineers, cuirassiers, sabreurs. 2 (the cavalry) finally, the cavalry arrived in the form of two fire engines: rescuer, savior, liberator, knight in shining armor, knight on a white chargerr.