Source : Webster's Revised Unabridged Dictionary (1913)

Hun \Hun\, n. [L. Hunni, also Chunni, and Chuni; cf. AS. H?nas,
   H?ne, OHG. H?ni, G. Hunnen.]
   One of a warlike nomadic people of Northern Asia who, in the
   5th century, under Atilla, invaded and conquered a great part
   of Europe.

Source : WordNet®

Hun
     n 1: a member of a nomadic people who invaded Europe in the 4th
          century
     2: offensive terms for a person of German descent [syn: {Kraut},
         {Krauthead}, {Boche}, {Jerry}]