What does CASSETUR BREVE mean? March 26, 2017 All Dictionary CASSETUR BREVE meaning in Law Dictionary (Lat. Your writ be quashed.) In practice. The type of the wisdom for the defendant on a plea in abatement where in fact the action had been commenced by initial writ, (breve.) 3 Bl. Comm. 303; Steph. PI. 107, 109.