err on the side of caution Meaning in the Cambridge English Dictionary
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Meaning of “err on the side of caution” in the English Dictionary

"err on the side of caution" in British English

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err on the side of caution

to be ​especiallycarefulrather than taking a ​risk or making a ​mistake: 25 ​people have ​replied to the ​invitation, but I've ​erred on the ​side of ​caution and put out 30 ​chairs.
(Definition of err on the side of caution from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
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