Home › Words › T › tertianshiptertianshiptertianship means the final period of formation for members of the Society of Jesus.Among words judged in Lexicurio's Arena, tertianship ranks #26,301 of 42,749 for Qualifying.EtymologyTertian + -shipnounThe final period of formation for members of the Society of Jesus.Definitions & examples from Wiktionary (CC BY-SA 3.0).