Meaning of “undertow” in the English Dictionary

british dictionary

"undertow" in British English

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undertownoun [ C usually singular ]

uk /ˈʌn.də.təʊ/ us /ˈʌn.dɚ.toʊ/

a strong current flowing underwater in a different direction to the way the water on the surface is moving, especially one that flows away from the land at the same time as a wave hits the beach

(Definition of “undertow” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"undertow" in American English

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undertownoun [ C ]

us /ˈʌn·dərˌtoʊ/

a strong current that flows under water away from a beach at the same time as waves on the surface move toward the beach

(Definition of “undertow” from the Cambridge Academic Content Dictionary © Cambridge University Press)