definitive

definition: supplying or being a final or conclusive settlement
example: a definitive verdict
speech part: adjective
synonyms: determinate
definition: clearly defined or formulated
example:
speech part: adjective
synonyms: unequivocal
definition: of recognized authority or excellence
example: the definitive work on Greece
speech part: adjective
synonyms: classical

definitive is explained and pronounced

How definitive is being used?