1. [n]  correctional institution for the detention and discipline and training of young or first offenders
2. [adj]  tending to reform; "reformative and rehabilitative agencies"; "reformatory punishment"

REFORMATORY is a 11 letter word that starts with R.

1. \Re*form"a*to*ry\ (-t?*r?), a.
   Tending to produce reformation; reformative.
   
   

2. \Re*form"a*to*ry\, n.; pl. {-ries} (-r?z).
   An institution for promoting the reformation of offenders.
   
         Magistrates may send juvenile offenders to
         reformatories instead of to prisons.     --Eng. Cyc.