Source : Webster's Revised Unabridged Dictionary (1913)

Migrant \Mi"grant\, a. [L. migrans, p. pr. of migrare. See
   {Migrate}.]
   Migratory. --Sir T. Browne. -- n. A migratory bird or other
   animal.

Source : WordNet®

migrant
     adj : habitually moving from place to place especially in search
           of seasonal work; "appalled by the social conditions of
           migrant life"; "migratory workers" [syn: {migratory}]
     n : traveler who moves from one region or country to another
         [syn: {migrator}]