ballroom
n. countable B2 Upper Intermediate US //ˈbɔɫˌɹum// UK //bˈɔːlɹuːm// ball·room
n. a large room designed for formal dancing, often found in hotels or historic buildings.
n. a large hall or room specifically designed for formal dancing, typically featuring a polished floor and space for an orchestra.
The wedding reception was held in the grand ballroom.
They booked the hotel ballroom for the annual charity gala, ensuring enough space for the dance floor and buffet tables.
The chandelier-lit ballroom echoed with the strains of a waltz, its marble floors reflecting the soft glow of candlelight as couples moved in elegant synchrony.
From ball + room.