conclusive

[kuhn-kloo-siv]
adjective
1.
serving to settle or decide a question; decisive; convincing: conclusive evidence.
2.
tending to terminate; closing.

Origin:
1580–90; < Late Latin conclūsīvus, equivalent to Latin conclūs(us) (past participle of conclūdere to conclude; see conclusion) + -īvus -ive

conclusively, adverb
conclusiveness, noun
nonconclusive, adjective
nonconclusively, adverb
nonconclusiveness, noun


1. definitive, determining.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
conclusive (kənˈkluːsɪv)
 
adj
1.  putting an end to doubt; decisive; final
2.  approaching or involving an end or conclusion
 
con'clusively
 
adv
 
con'clusiveness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

conclusively
1550s, "in conclusion," from conclusive (q.v.). Meaning "decisively" is recorded from 1748.

conclusive
1610s, "occurring at the end," from L.L. conclusivus, from conclus-, pp. stem of concludere (see conclude). Meaning "definitive, decisive, convincing" (putting an end to debate) is from 1640s.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
And both parties agree to consider such map and declaration as finally and
  conclusively fixing the said boundary.
Cobras deliberately aim for the eyes of whomever or whatever they feel
  threatened by, researchers have conclusively proved.
If politics were not a factor and modernization implemented, conclusively it
  would still be airworthy.
No corporate saga has ever demonstrated quite so conclusively that politics and
  business don't mix.
Synonyms
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