the grammatical person used by a speaker in statements referring to himself or herself or to a group including himself or herself, as I and we in English.
2.
a form in the first person.
Origin
1935-40
British Dictionary definitions for first person
first person
noun
1.
a grammatical category of pronouns and verbs used by the speaker to refer to or talk about himself or herself, either alone (first person singular) or together with others (first person plural)