1.AdjectiveLacking instructions or reference material.
"Undocumented software can be very difficult to learn to use."
2.AdjectiveNot having official documents that provide identification, authorization, etc.
Not having official documentation required to legally enter, reside in, or work in a country.
"undocumented immigrant"
3.AdjectiveNot having official documentation required to legally enter, reside in, or work in a country.