[1] : The Collaborative International Dictionary of English v.0.48

dead-on \dead-on\ adj.
   precisely accurate and to the point; as, a dead-on feel for
   characterization. prenominal and informal

   syn: precise.
        wordnet 1.5

              she avoids big scenes . . . preferring to rely on
              small gestures and dead-on dialogue. --peter s.
                                                  prescott
        wordnet 1.5

[2] : WordNet (r) 2.0

dead-on
     adj : accurate and to the point; "a dead-on feel for
           characterization"; "she avoids big scenes...preferring
           to rely on small gestures and dead-on dialogue"- peter
           s.prescott syn: dead-ona
see also:
dead-ona 

Dead-On >> D Words
Dead-On, definition of term: Dead-On
dead-on_pag1.html