adj

undocumented

adj

Not recorded in official papers or written instructions.

"The software has several undocumented features that only power users know about."

Lacking the official papers required to legally live or work in a country.

"The charity offers legal advice to undocumented workers."

How to Use Undocumented

Learner’s notes

In plain EnglishMissing the official paperwork — either technical documentation or legal immigration status.

When to use it

"Undocumented" is the standard, neutral term used for immigrants without legal status; avoid older, more loaded terms.

Common pairings

undocumented immigrant undocumented feature undocumented worker

undocumenteds plural

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Can you complete this real example?

The software has several _____ features that only power users know about.

From un- ("not") plus documented, the past participle of document.

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