definitive

形容词 definitive:

1. clearly defined or formulated- R.B.Taney
   同义词：unequivocal
2. of recognized authority or excellence
   同义词：authoritative, classical
3. supplying or being a final or conclusive settlement
   同义词：determinate

1. She's written the definitive history of Vienna.
   她写下了权威性的维也纳历史。

de.fin.i.tive

adj.（形容词）
Precisely defined or explicit.
确定的：精确限定的或明确的
Supplying or being a final settlement or decision; conclusive.See Synonyms at decisive
最后的：提供或成为最后的解决办法或决定的；决定性的参见 decisive
Authoritative and complete:
权威性的：可靠的，完全的：
例句：
a definitive biography.See Usage Note at definite
写实的传记参见 definite

Biology Fully formed or developed, as an organ or structure.
【生物学】 定形的，成形的：器官或结构发育完全的或
n.Grammar （名词）【语法】
A word that defines or limits, such as the definite article or a demonstrative pronoun.
限定词：起限定或限制作用的词，如定冠词或指示代词

【引伸】
defin.itively
adv.（副词）
defin.itiveness
n.（名词）