first generation
First generation (adjective) means describing a person who was born in a country to parents who immigrated there, or, in other uses, the immigrant who arrived first; the term is applied both ways depending on who is speaking. Example: “As a first-generation American, she grew up translating letters for her parents.”
How to use first generation
Learner’s notesIn plain EnglishThe first people in a family — or the first version of a thing — to do or be something.
Hyphenated before a noun (a first-generation student), usually open after the verb (she is first generation). Often shortened to first-gen in American speech.
Because the immigration sense is genuinely ambiguous, say which you mean — "born here to immigrant parents" or "came here as an immigrant" — when precision matters.