Source : Webster's Revised Unabridged Dictionary (1913)

Immigrant \Im"mi*grant\, n. [L. immigrans, p. pr. of immigrare
   to go into: cf. F. immigrant. See {Immigrate}.]
   One who immigrates; one who comes to a country for the
   purpose of permanent residence; -- correlative of emigrant.

   Syn: See {Emigrant}.

Source : WordNet®

immigrant
     n : a person who comes to a country where they were not born in
         order to settle there