N-400 Application for Naturalization
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Definition of "N-400 Application for Naturalization"
The N-400 Application for Naturalization is a US Citizenship form. Permanent residents of the United States, who meet certain requirements, can apply for United States Citizenship using this form. The N-400 Application for Naturalization is also known as USCIS Form N-400, Form N-400, Immigration Form N-400, or simply N 400.
