From WordNet (r) 2.0 (August 2003) [wn]:
jailbreak
n : an escape from jail; "the breakout was carefully planned"
[syn: break, breakout, gaolbreak, prisonbreak,
prison-breaking]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
jailbreak \jailbreak\ n.
an escape from jail; as, five prisoners escaped in a
coordinated jailbreak.
Syn: break, breakout, gaolbreak, prisonbreak,
prison-breaking.
[WordNet 1.5]