English Reference
Noun

churn

n. uncountable
C1 Advanced US /ˈtʃɝn/ UK /tʃˈɜːn/ churn UK spelling churned, churns Aviation Business Finance Travel

n.the rate at which customers stop using a service or subscribers cancel their memberships. It is a key number for businesses to track how well they keep their clients.

n.the proportion of contractual customers or subscribers who leave a supplier during a given time period. Often used in subscription-based business models to measure retention efficiency.


SIMPLE

The company is trying to reduce customer churn this quarter.

CONTEXTUAL

High churn in the telecommunications industry often forces companies to offer aggressive discounts to attract new subscribers.

COMPLEX

While the startup reported record-breaking user acquisition, the high monthly churn suggested that the core product failed to provide long-term value to its target audience.

Usage

Often functions as a modifier in compound nouns like 'churn rate' or 'customer churn'.

The constant churn of managers and players at Watford will catch up with them at some point.

The Guardian· 13 Aug 2026

Ligue 1 has always been a ​stopover for its top talents, but the rate of churn has hit new levels.

The Guardian· 21 Aug 2026

Noun from Middle English chyrne, cherne, kyrne ( > Scots kirn), from Old English ċyrn, ċyrin, ċirin (“churn”), from Proto-Germanic kirnijǭ (“churn”); verb from Middle English chyrnen from Old English ċernan, from Proto-Germanic kirnijaną (“to churn, stir”), of unknown origin. Cognate with West Frisian tsjerne, Dutch karn, Walloon serene, German Karn, Kirne, Norwegian Bokmål kjerne, Danish kærne, Swedish kärna, Icelandic kirna.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin gem-pro *kirnijaną
Level C1 · Advanced
Frequency Occasional
Updated