ballroomPronunciation: /ˈbɔːlruːm, -rʊm/Translate ballroom | into French | into German | into Italian | into Spanish Definition of ballroom noun 1a large room for formal dancing. 2 [mass noun] ballroom dancing:the number of people learning ballroom has doubled in the last two yearsballroom in other Oxford dictionaries Definition of ballroom in the US English dictionary