three party

/ˈθriːˌpɑːrti/
adjective
  1. Involving three separate groups, organizations, or individuals, especially in a political, legal, or business context.
    • The three-party coalition government struggled to agree on a budget.
    • A three-party debate was held to give voters a chance to hear all candidates.
    • They signed a three-party agreement to share the costs of the new software.
Synonyms