lacking documentation or authentication.
lacking proper immigration or working papers: an undocumented worker;undocumented immigrants.

Origin of undocumented

First recorded in 1880–85; un-1 + documented

Usage note

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for undocumented

Contemporary Examples of undocumented

Historical Examples of undocumented

  • Surely it is safe here to domicile the restless Doctor, for these ten undocumented years between 1805 and 1815.

    Seaport in Virginia

    Gay Montague Moore

  • His idea of generosity was the undocumented and unqualified purchase of a person by payments made in the form of a gift.

    The Wife of Sir Isaac Harman

    H. G. (Herbert George) Wells

  • Already that undocumented Magna Charta was manifestly not working upon the lines she had anticipated.

    The Wife of Sir Isaac Harman

    H. G. (Herbert George) Wells

  • The two specimens of this plate in the national collections are undocumented.

    American Military Insignia 1800-1851

    J. Duncan Campbell and Edgar M. Howell.

Word Origin and History for undocumented

1883, from un- (1) "not" + past participle of document (v.).

Online Etymology Dictionary, © 2010 Douglas Harper