coalition UK /kəʊ.əˈlɪʃ.ən/US /koʊ.əˈlɪʃ.ən/ noun2 •A temporary group or union of organizations, usually formed for a particular advantage.The Liberal Democrats and Conservative parties formed a coalition government in 2010. •A group of cheetahs.Majed Sultan Ali was on his second visit to the game reserve in a bid to photograph a coalition of cheetahs. — 2014 formscoalitions