- 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
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- 2[countable, uncountable] something that does not happen at regular intervals a slight irregularity in his heartbeat
- 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
Check pronunciation: irregularity