Definition of panic room noun from the Oxford Advanced Learner's Dictionary

 

panic room

 noun
noun
BrE
 
; NAmE
 
(also safe room)
 
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a room in a home or an office building where people can go to avoid a dangerous situation The door and walls of the panic room are made of steel. The panic room has a secret entrance that is impossible to detect unless you know it is there.
See the Oxford Advanced American Dictionary entry: panic room