Definition of dereliction noun from the Oxford Advanced American Dictionary

     

    dereliction

     noun
    noun
    NAmE//ˌdɛrəˈlɪkʃn//
     
    (formal)
     
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  1. 1[uncountable] the state of being derelict industrial/urban dereliction a house in a state of dereliction
  2. 2[uncountable, singular] dereliction of duty (formal or law) the fact of deliberately not doing what you ought to do, especially when it is part of your job The police officers were found guilty of serious dereliction of duty.
See the Oxford Advanced Learner's Dictionary entry: dereliction