divided into or consisting of three parts: the tripartite occupation of West Germany.
2.
involving, participated in, or made by three parties: a tripartite treaty signed by Argentina, Brazil, and Chile.
3.
Botany. divided into three parts.
Origin: 1375–1425; late Middle English < Latin tripartītus divided into three parts, equivalent to tri-tri- + partītus, past participle of partīre to divide. See part, -ite2