[1] : The Collaborative International Dictionary of English v.0.48

ballroom \ball"room`\, n.
   a room for balls or dancing.
   1913 webster

[2] : WordNet (r) 2.0

ballroom
     n : large room used mainly for dancing syn: dance hall, dance
         palace
see also:
dance hall dance palace 

[3] : Moby Thesaurus II by Grady Ward, 1.0

27 moby thesaurus words for "ballroom":
   amusement park, cabaret, cafe chantant, cafe dansant, casino,
   chamber, chambre, dance floor, dance hall, dancery,
   dancing pavilion, entertainment industry, fun-fair, grand ballroom,
   juke joint, night spot, nightclub, nitery, resort, roadhouse, room,
   rotunda, salle, show biz, show business, tavern, theater

Ballroom >> B Words
Ballroom, definition of term: Ballroom
ballroom_pag1.html

Ballroom Dance >> B Words
Ballroom Dance, definition of term: Ballroom Dance
ballroom+dance_pag1.html