definitive
Cross references: 1. conclusive de.fin.i.tive \di-'fin-*t-iv\ aj 1: serving to provide a final solution : CONCLUSIVE {a ~ v ictory} 2: authoritative and apparently exhaustive {the ~ book on the subj ect} 3: serving to define or specify precisely 4: fully differentiated or developed - de.fin.i.tive.ly av