Definition of stable door noun from the Oxford Advanced Learner's Dictionary

 

stable door

 noun
noun
BrE
 
; NAmE
 
(British English)(North American English Dutch door)
 
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  • a door which is divided into two parts so that the top part can be left open while the bottom part is kept shut
  • Idioms
    close, lock, etc. the stable door after the horse has bolted(British English)(US English close, etc. the barn door after the horse has escaped)
     
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    to try to prevent or avoid loss or damage when it is already too late to do so