conclusive
1. [ adjective ] final and deciding
Examples:

"the conclusive reason"

Related terms: decisive
2. [ adjective ] forming an end or termination; especially putting an end to doubt or question
Examples:

"conclusive proof" "the evidence is conclusive"

Related terms: inconclusive definitive convincing decisive finality
3. [ adjective ] expressing finality with no implication of possible change
Synonyms: absolute
Examples:

"an absolute (or unequivocal) guarantee to respect the nation's authority" "inability to make a conclusive (or unequivocal) refusal"

Related terms: unequivocal
Similar spelling:   conclusively
  conclusion
  conclude
  conclave
  concluded
  conciliative
  conglutinate
  concluding
  Cinclus