American English

Definition of first name noun from the Oxford Advanced American Dictionary


first name

(also given name)
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a name that was given to you when you were born, that comes before your family name His first name is Tom and his last name is Green. The children all know each other by their first names. to be on a first-name basis with someone (= to call them by their first name as a sign of a friendly, informal relationship)
See the Oxford Advanced Learner's Dictionary entry: first name