1
- (of a conclusion or agreement) done or reached decisively and with authority（结论, 协议）确定的; 最终的：
a definitive diagnosis.
确诊。
1.1
- (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。
2
- (of a postage stamp) for general use and typically of standard design, not special or commemorative（邮票）普通标准型的。
- a definitive postage stamp普通邮票。
USAGE
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'. Thus， a 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.
派生词
definitively
adverb词源
late Middle English: from Old French definitif, -ive, from Latin definitivus, from definit- ' set within limits'， from the verb definire （see DEFINE）.