to close the stable door after the horse has bolted

英語での「 close the stable door after the horse has bolted」の定義と意味

to close the stable door after the horse has bolted
01

後の祭り, 手遅れ

to try to prevent something bad from happening after it has already happened
to [close|shut|lock] the (stable|barn) door after the horse (has bolted|is stolen) definition and meaning
idiom
old use
After the company's sensitive information was leaked, they installed new security measures, but it was like closing the stable door after the horse had bolted.
盗難後にカメラを設置しても後の祭りだった。
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