Meaning : Clearly defined or formulated.
Example :
The plain and unequivocal language of the laws.
Synonyms : unequivocal
Meaning : Of recognized authority or excellence.
Example :
The definitive work on Greece.
Synonyms : authoritative
Meaning : Supplying or being a final or conclusive settlement.
Example :
A definitive verdict.
A determinate answer to the problem.
Synonyms : determinate