This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Of, relating to, or involving more than two political parties.

adj. Involving several different political parties.

adj. Having multiple parties (involved persons).

"Our CC makes it crystal-clear to CPNM and the people at large that there can be no genuine democracy in any country without the capture of state power by the proletariat and that the so-called multiparty democracy cannot bring any basic change in the lives of the people."

multipartisan   

off-year    multi-cultural    root-and-branch    intra-party    multiracial