ballroom
Concise Oxford English Dictionary © 2008 Oxford University Press:
ballroom/ˈbɔːlruːm/
▶noun a large room for formal dancing.
'ballroom' also found in these Oxford entries:
ballroom dancing
- cha-cha
- formation dancing
- foxtrot
- galop
- ice dancing
- minuet
- old-time
- paso doble
- Paul Jones
- round dance
- rumba
- samba
- sequence dancing
- tango
- turkey trot
- veleta

