Cassation \Cas*sa"tion\, n. [F. cassation. See {Cass}.] The act of annulling. [1913 Webster] A general cassation of their constitutions. --Motley. [1913 Webster] {Court of cassation}, the highest court of appeal in France, which has power to quash (Casser) or reverse the decisions of the inferior courts. [1913 Webster]