From Longman Dictionary of Contemporary Englishjailbreakjail‧break1 (also gaolbreak British English) /ˈdʒeɪlbreɪk/ noun [countable] SCJESCAPEan escape or an attempt to escape from prison, especially by several peoplejailbreakjailbreak2 verb [transitive] to do something to the operating system on a smartphone that allows you to use unofficial software He wanted to jailbreak his iPhone. —jailbreaking noun [uncountable]
