Meaning of “first name” in the English Dictionary

british dictionary

"first name" in British English

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first namenoun [ C ]

uk /ˈfɜːst ˌneɪm/ us /ˈfɝːst ˌneɪm/

A2 the name that was given to you when you were born and that comes before your family name:

It can be rude to call people by their first name if they are much older or more important than you.
on first-name terms UK US on a first-name basis

friendly or familiar enough with someone to call that person by their first name

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

"first name" in American English

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first namenoun [ C ]

/ˈfɜrst ˈneɪm/

your personal name, which comes before your other names:

"James" and "Sarah" are first names.

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