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collaboration

noun [U] (HELPING AN ENEMY)
 
 
/kəˌlæb.əˈreɪ.ʃən/ disapproving

Definition

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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