Source : Webster's Revised Unabridged Dictionary (1913)

Estrangement \Es*trange"ment\, n. [Cf. OF. estrangement.]
   The act of estranging, or the state of being estranged;
   alienation.

         An estrangement from God.                --J. C.
                                                  Shairp.

         A long estrangement from better things.  --South.

Source : WordNet®

estrangement
     n 1: separation resulting from hostility [syn: {alienation}]
     2: the feeling of being alienated from other people [syn: {alienation},
         {disaffection}]