Definition of irregularity noun from the Oxford Advanced American Dictionary

     

    irregularity

     noun
    noun
    NAmE//ɪˌrɛɡyəˈlærət̮i//
     
    (pl. irregularities)
     
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  1. 1[countable, uncountable] an activity or a practice which is not according to the usual rules, or not normal alleged irregularities in the election campaign suspicion of financial irregularity
  2. 2[countable, uncountable] something that does not happen at regular intervals a slight irregularity in his heartbeat
  3. 3[uncountable, countable] something that is not smooth or regular in shape or arrangement The paint will cover any irregularity in the surface of the walls. compare regularity
See the Oxford Advanced Learner's Dictionary entry: irregularity