coalition
noun [ C ]
uk/kəʊəˈlɪʃən/ us POLITICS
a group of two or more political parties working together to win an election or govern an area:
form/build/assemble a coalition With no party having gained overall control in the election, the two largest parties hope to form a coalition.
enter into/join a coalition
a coalition government
a group of people or organizations working together to achieve something:
A coalition of environmental groups is working on a plan to reduce pollution in the city.