The Collaborative International Dictionary of English v.0.48:

Reunite \Re`u*nite"\, v. t. & i.
   To unite again; to join after separation or variance. --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

reunite
    v 1: have a reunion; unite again
    2: unify again, as of a country; "Will Korea reunify?" [syn:
       reunify, reunite]

Moby Thesaurus II by Grady Ward, 1.0:

20 Moby Thesaurus words for "reunite":
   accommodate, adjust, arrange matters, bring to terms,
   bring together, compose, compromise, fix up, harmonize,
   heal the breach, mediate, patch things up, put in tune, reconcile,
   resolve, restore harmony, settle, settle differences,
   smooth it over, weave peace between