involving three parties or elements; "the triangular mother-father-child relationship"; "a trilateral agreement"; "a tripartite treaty"; "a tripartite division"; "a three-way playoff"
A charge, particularly (but not exclusively) a cross, divided longitudinally into three parts in three different colours, as in the flag of Dominica. National Flag of Dominica (fotw)
In Christian theology, tripartite refers to the view that man is a composite of 3 distinct components: body, soul and spirit. It is less popular than the bipartite view, where "soul" and "spirit" are taken as different terms for the same entity.