con·flu·ence 
/ˈkɑ:nˌflu:wəns/ noun
/ˈkɑ:nˌflu:wəns/ noun [singular] 1 technical : a place where two rivers or streams join to become one
▪ the Mississippi River's confluence with the Missouri River 2 somewhat formal : a situation in which two things come together or happen at the same time — usually + of ▪ a confluence of musical styles ▪ a rare confluence of events
▪ the Mississippi River's confluence with the Missouri River
