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  • Word comparison: undocumented vs. illegal

undocumented vs. illegal

undocumented

adjective

  1. lacking documentation or authentication.

  2. lacking proper immigration or working papers: undocumented immigrants.

    an undocumented worker;

    undocumented immigrants.

illegal

adjective

  1. forbidden by law or statute.

    Synonyms: unlicensed, illicit, illegitimate, unlawful

  2. contrary to or forbidden by official rules, regulations, etc..

    The referee ruled that it was an illegal forward pass.

noun

  1. Informal: Disparaging and Offensive.,  illegal alien.