definitive

Adjective

• supplying or being a final or conclusive settlement
  • a definitive verdict
    
  • a determinate answer to the problem
    

• of recognized authority or excellence
  • the definitive work on Greece
    
  • classical methods of navigation
    

• clearly defined or formulated
  • the plain and unequivocal language of the laws- R.B.Taney
    

Related words

• Synonyms: 
  determinate , authoritative , classical , classic , unequivocal