Definition of USCIS abbreviation from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌjuː es siː aɪ ˈes//
; NAmE NAmE//ˌjuː es siː aɪ ˈes//
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United States Citizenship and Immigration Services (the US government department that deals with people from other countries who want to visit or live in the US or to become a US citizen, part of the Department of Homeland Security)
See the Oxford Advanced American Dictionary entry: USCIS