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English definition of “irregular”

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irregular

adjective
 
 
/ɪˈreɡjələr/
not happening at regular times or in regular amounts: Many firms have an irregular cashflow. You will not be penalised for contributing irregular amounts, or missing or stopping payments. Airport staff inspect the runways three times a day at irregular intervals.
not according to usual rules or what is expected, and often not acceptable: Investigators found these bank deposits to be highly irregular because the amount exceeded the man's income. Certain irregular business practices were identified.
(Definition of irregular from the Cambridge Business English Dictionary © Cambridge University Press)
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