in ballet, the horizontal handrail, usually wooden, that is fixed to the walls of a ballet studio approximately 3.5 feet (1 m) from the floor. It is used by dancers as an aid to confidence and as a point of support during the preliminary exercises (barre work) that have been an essential part of ballet training since the development of classical ballet in the 19th century.
BARRE
Meaning of BARRE in English
Britannica English vocabulary. Английский словарь Британика. 2012