Webster's English Dictionary

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error

er.ror \'er-*r\ \'er-*r-l*s\ n [ME errour, fr. OF, fr. L error, fr. errare] 
   1a: an act or condition of often ignorant or imprudent deviation from a cod 
   e of behavior 1b: an act involving an unintentional deviation from truth or 
   accuracy  1c1: an act that through ignorance, deficiency, or accident 
   departs from or  fails to achieve what should be done 1c2: a defensive 
   misplay other than a wild pitch or passed ball made by a b aseball player 
   when normal play would have resulted in an out or prevented an advance by a 
   base runner 1d: a mistake in the proceedings of a court of record in 
   matters of law or  of fact 2a: the quality or state of erring  Christian 
   Science  2b: illusion about the nature of reality that is the cause of 
   human sufferi ng : the contradiction of truth 2c: an instance of false 
   belief  3: something produced by mistake  4a: the difference between an 
   observed or calculated value and a true value ; specif : variation in 
   measurements, calculations, or observations of a quantity due to mistakes 
   or to uncontrollable factors 4b: the amount of deviation from a standard or 
   specification ean a departure from what is true, right, or proper. ERROR 
   may imply carelessness or wilfulness in failing to follow a true course or 
   a model, but it may suggest an inaccuracy where accuracy is impossible; 
   MISTAKE implies misconception or inadventence and is seldom a harsh term; 
   BLUNDER commonly implies stupidity or ignorance and usu. culpability; SLIP 
   carries a strong implication of inadventence or accident producing trivial 
   mistakes; LAPSE implies forgetfulness, weakness, or inattention - 
   er.ror.less aj SYN syn ERROR, MISTAKE, BLUNDER, SLIP, LAPSE m