Totum duplex is the highest rank for an ecclesiastical feast in the Dominican breviary. Other ranks are Duplex, Semiduplex and Simplex.
Respective highest ranks in other breviaries are:
Roman: Festum duplex Cistercian: Festum sermonis majus Carmelite: Duplex majus
See also Glossary of the Catholic Church
References Ecclesiastical Feasts by the Catholic Encyclopedia