Lacking instructions or reference material.
Undocumented software can be very difficult to learn to use.
Not having official documents that provide identification, authorization, etc.
On arrival from a foreign port, undocumented foreign-built vessels, if laden with goods, wares or merchandise, may, with their cargoes, be subject to forfeiture.
Synonym of undocumented immigrant.
Although the first generation is likely to have greater fluency than the undocumenteds, the controversy over bilingual education attests to the persistence of language difficulties.
From un- + documented.
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