Webster's English Dictionary

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blunder

Cross references:
  1. error                 
 
1. blun.der \'bl*n-d*r\ \-d(*-)rin\ \-d*r-*r\ vb or blun.der.ing [ME 
   blundren] 1: to move unsteadily or confusedly  2: to make a mistake through 
   stupidity, ignorance, confusion, or carelessn ess 1: to utter stupidly, 
   confusedly, or thoughtlessly  2: to make a stupid, careless, or thoughtless 
   mistake in  - blun.der.er n
2. blunder n : a gross error or mistake resulting from stupidity, 
   ignorance, confusion,  or carelessness