par ‧ ti ‧ ci ‧ pa ‧ tory AC /pɑːˌtɪsəˈpeɪt ə ri◂, pɑːˌtɪsɪˈpeɪt ə ri◂ $ pɑːrˈtɪsəpətɔːri/ BrE AmE adjective [usually before noun] formal
a participatory way of organizing something, making decisions etc is one that involves everyone who will be affected:
a participatory democracy