conclusive, decisive, determinative, definitive mean bringing to an end. conclusive applies to reasoning or logical proof that puts an end to debate or questioning.

DECISIVE definition: having the power or quality of deciding; putting an end to controversy; crucial or most important. See examples of decisive used in a sentence.

DECISIVE definition: 1. able to make decisions quickly and confidently, or showing this quality: 2. strongly affecting…. Learn more.

1. Settling a matter or conflict; conclusive: the decisive battle in the war; the decisive piece of evidence in the lawsuit. 2. Characterized by or showing the ability to make decisions quickly …

If someone is decisive, they have or show an ability to make quick decisions in a difficult or complicated situation. He should give way to a more imaginative, more decisive leader.

de•ci•sive /dɪˈsaɪsɪv/ adj. having the power to decide: The decisive argument was the savings his plan would bring. displaying firmness; resolute: a decisive manner. unquestionable; definite: a …

Factsheet What does the word decisive mean? There are five meanings listed in OED's entry for the word decisive. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

Dec 14, 2025 · decisive (comparative more decisive, superlative most decisive) Having the power or quality of deciding a question or controversy; putting an end to contest or controversy; final; …

Definition of decisive. English dictionary and integrated thesaurus for learners, writers, teachers, and students with advanced, intermediate, and beginner levels.

DECISIVE meaning: 1 : able to make choices quickly and confidently; 2 : causing something to end in a particular way determining what the result of something will be