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English definition of “churn”

churn

noun [U]     /tʃɜːn/ (also churning)
COMMERCE, MARKETING the situation in which customers stop buying the products or services of a particular company, especially to buy them from a competitor: Preventing customer churn is a major concern for mobile service providers, since 20-40% of customers leave their providers in a given year. → Compare customer loyalty
HR the situation in which employees leave their job and are replaced by new employees: Employee churn for new hires increased by 33% for the third straight year.
(Definition of churn noun from the Cambridge Business English Dictionary © Cambridge University Press)
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