/ Dictionary / Index U undocumented: Meaning and Definition of Find definitions for: un•doc•u•ment•ed Pronunciation: (un-dok'yu-men"tid), [key] — adj. lacking documentation or authentication. lacking proper immigration or working papers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: undocumented (Thesaurus) undock undoing Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language