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irregularity

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noun British English pronunciation: irregularity /ɪˌreɡjʊˈlærəti/ 
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singularirregularity
pluralirregularities
  1. 1
    [countable] [often plural] a situation in which the rules, laws, or usual ways of doing things have not been followed

    There were several reports of irregularities in the election process.

  2. 3
    [countable] a shape or appearance that is not even, straight, or smooth

    Even the slightest surface irregularity will show.

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