Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
three-party is an adjective meaning "involving three parties or elements". It carries one recorded sense.
involving three parties or elements
“a tripartite treaty”
“a tripartite division”
“a three-way playoff”
Definitions, synonyms and semantic relations for three-party come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.