Home › Words › T › triduantriduan/ˈtɹɪdjʊən/triduan · adj — lasting three days.Definition from Wiktionary (CC BY-SA 3.0).triduan is pronounced /ˈtɹɪdjʊən/.EtymologyFrom Latin triduanus, from triduum (“space of three days”).adjLasting three days.Happening every third day.nounAn event lasting three days.Definitions & examples from Wiktionary (CC BY-SA 3.0).