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English definition of “defection”

defection

noun [C or U]     /dɪˈfek.ʃən/
the act of leaving a country, political party, etc. to go to another one: Over the years there were hundreds of defections to the West/defections from the East. Recent changes in policy have resulted in large-scale defection from the party.Running away and escaping
(Definition of defection noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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