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Definition of Alien and Unauthorized Immigrant

The distinction between the terms 'alien' and 'unauthorized immigrant' in the context of U.S. immigration law and policy, including their definitions, usage, and implications for enforcement and eligibility.

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Feb 1, 2026
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What distinctions do federal agencies (DHS, USCIS, DOJ) make between 'alien' and 'unauthorized immigrant'?

The federal term "alien" is a statutory label meaning any person who is not a U.S. citizen or national, a definition found in Title 8 of the and used across ">immigration statutes and agency materials...