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English definition of “collaboration”

collaboration

noun [U] (HELPING AN ENEMY)    /kəˌlæb.əˈreɪ.ʃən/ disapproving
the situation of people working with an enemy who has taken control of their country: She was accused of collaboration.Disloyalty, betrayal and treason
(Definition of collaboration noun (HELPING AN ENEMY) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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