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English definition of “invasion”

invasion

noun [C or U]     /ɪnˈveɪ.ʒən/
B2 an occasion when an army or country uses force to enter and take control of another country : They were planning to mount an invasion of the north of the country .Attacking and invading C2 an occasion when a large number of people or things come to a place in an annoying and unwanted way: the annual invasion of foreign tourists Arrivals and departures C2 an action or process that affects someone's life in an unpleasant and unwanted way: an invasion of privacy Serious and unpleasantNot attractive to look atInformal words for badDifficult situations and unpleasant experiencesAccidents and disasters
(Definition of invasion noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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