The Collaborative International Dictionary of English v.0.48:

Rehear \Re*hear"\ (r?*h?r"), v. t.
   To hear again; to try a second time; as, to rehear a cause in
   Chancery.
   [1913 Webster]

WordNet (r) 3.0 (2006):

rehear
    v 1: hear or try a court case anew [syn: rehear, retry]