1) British reformatory 2) English correctional school 3) Old reform school for youths 4) Reform school 5) Reformatory 6) School for bad lads 7) Training school 8) Young offenders institution 1) Prison 
A borstal was a type of youth detention centre in the United Kingdom and the Commonwealth. In India, it is known as a borstal school. Borstals were run by HM Prison Service and intended to reform seriously delinquent young people. The word is sometimes used loosely to apply to other kinds of youth institution or reformatory, such as Approved Schoo...
In the UK, formerly a place of detention for offenders aged 15-21, first introduced in 1908. From 1983 borstal institutions were officially known as youth custody centres, and have been replaced...
Borstal is old English slang for a steep and narrow path up a hill in which one could hide.
[n] - a British reform school for youths between 16 and 22
old English slang for a steep and narrow path up a hill in which one could hide.
noun a British reform school for youths between 16 and 22
In the UK, formerly a place of detention for offenders aged 15–21, first introduced in 1908. From 1983 borstal institutions were officially known as youth custody centres, and have been replaced by young offender institutions
(in England) a school for delinquent boys that provides therapy and vocational training.