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English definition of “blunder”

blunder

verb [I] (MISTAKE)    /ˈblʌn.dər/ US  /-dɚ/
to make a serious mistake , usually because of not taking care or thinking : Police blundered by not releasing more details about the case to focus public interest .Making mistakes blunderer     /r/ US  // noun [C] Stupid and silly people blundering     /-ɪŋ/ adjective [before noun] You blundering idiot ! What do you think you're doing?Inability and awkwardness
(Definition of blunder verb (MISTAKE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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