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[ih-ruhpt] /ɪˈrʌpt/

verb (used without object)
to break or burst in suddenly.
to manifest violent activity or emotion, as a group of persons.
(of animals) to increase suddenly in numbers through a lessening of the number of deaths.
verb (intransitive)
to enter forcibly or suddenly
(of a plant or animal population) to enter a region suddenly and in very large numbers
(of a population) to increase suddenly and greatly

“to break into,” 1855, back-formation from irruption or else from Latin irruptus, past participle of irrumpere (see irruption).


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