Meaning of “surname” in the English Dictionary

british dictionary

"surname" in British English

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surnamenoun [ C ]

uk /ˈsɜː.neɪm/ us /ˈsɝː.neɪm/ mainly UK US usually last name, UK also second name

A2 the name that you share with other members of your family; last name:

Her first name is Sarah but I don't know her surname.

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

"surname" in American English

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surnamenoun

us /ˈsɜr·neɪm/

your last name

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