conclusive

 
Pronunciation: /kənˈkluːsɪv/

adjective

  • (of evidence or argument) having or likely to have the effect of proving a case; decisive: conclusive evidence the findings were by no means conclusive
  • (of a victory) achieved easily or by a large margin: a conclusive 5-O win

Derivatives

conclusively

adverb

conclusiveness

noun

Origin:

late 16th century (in the sense 'summing up'): from late Latin conclusivus, from Latin conclus- 'closed up', from the verb concludere (see conclusion)