col·le·gi·al·i·ty I. \kəˌlējēˈaləd.ē, -ətē\noun (-es) Etymology: French collégial of a colleague (from Middle French, from Latin collegialis) + English -ity : the relationship of colleagues < the impediment of collegiality, under which in old days one tribune could nullify the work of another — John Buchan > II. noun : the participation of bishops in the government of the Roman Catholic Church in collaboration with the pope