ref·er·en·dum 
/ˌrɛfəˈrɛndəm/ noun
plural ref·er·en·da /ˌrɛfəˈrɛndəm/ noun /-də/ or ref·er·en·dums : an event in which the people of a county, state, etc., vote for or against a law that deals with a specific issue : a public vote on a particular issue [count] ▪ They are having/holding a referendum to decide the issue. = They are having/holding a referendum on the issue. [noncount] ▪ The issue was decided by referendum.
