The Collaborative International Dictionary of English v.0.48:

Pauper \Pau"per\, n. [L. See Poor.]
   A very poor person; one without any means of support,
   especially one dependent on private or public charity. Also
   used adjectively; as, pauper immigrants, pauper labor.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pauper
    n 1: a person who is very poor