Source : Webster's Revised Unabridged Dictionary (1913)

Horde \Horde\, n. [F. horde (cf. G. horde), fr. Turk. ord?,
   ord[=i], camp; of Tartar origin.]
   A wandering troop or gang; especially, a clan or tribe of a
   nomadic people migrating from place to place for the sake of
   pasturage, plunder, etc.; a predatory multitude. --Thomson.

Source : WordNet®

horde
     n 1: a vast multitude [syn: {host}, {legion}]
     2: a nomadic community
     3: a moving crowd [syn: {drove}, {swarm}]