definitive

definitive
adjective

(of a conclusion or agreement) done or reached decisively and with authority
（结论，协议）确定的
a definitive diagnosis.
确诊。
■(of a book or other text) the most authoritative of its kind
（书或其他文本）最权威的
the definitive biography of Prince Charles.
最权威的查尔斯王子传。
(of a postage stamp) for general use and typically of standard design, not special or commemorative
（邮票）普通标准型的

noun

派生
definitively
adverb
语源

late Middle English: from Old French definitif, -ive, from Latin definitivus, from definit- 'set within limits', from the verb definire (see define)

用法

Definitive is often used, rather imprecisely, when definite is actually intended, to mean simply ‘clearly decided’. Although definitive and definite have a clear overlap in meaning, definitive has the additional sense of ‘having an authoritative basis’. Thusa definitive decision is one which is not only conclusive but also carries the stamp of authority or is a benchmark for the future, while a definite decision is simply one which has been made clearly and is without doubt

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