quadranscentennial UK /ˈkwɒd.ɹən.sɛnˈtɛn.ɪ.əl/US /ˈkwɑd.ɹən.sɛnˈtɛn.i.əl/adjective 2noun 1forms 1 adjective2 •Occurring every twenty-five years. •Of or related to a twenty-five-year period. noun1 •The twenty-fifth anniversary of an event or happening. formsquadranscentennials
