decisive

adjective de·ci·sive \di-ˈsī-siv\

: able to make choices quickly and confidently

: causing something to end in a particular way : determining what the result of something will be

: very clear and obvious

Full Definition of DECISIVE

: having the power or quality of deciding <a decisive battle>

: resolute, determined <a decisive manner>

: unmistakable, unquestionable <a decisive superiority>

— de·ci·sive·ly adverb

— de·ci·sive·ness noun

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First Known Use of DECISIVE

1611

Related to DECISIVE

Synonyms: bent (on or upon), bound, determined, do-or-die, firm, hell-bent (on or upon), intent, out, purposeful, resolute, resolved, set, single-minded

Antonyms: faltering, hesitant, indecisive, irresolute, undetermined, unresolved, vacillating, wavering, weak-kneed

Synonym Discussion of DECISIVE

conclusive, decisive, determinative, definitive mean bringing to an end. conclusive applies to reasoning or logical proof that puts an end to debate or questioning <conclusive evidence>. decisive may apply to something that ends a controversy, a contest, or any uncertainty <a decisive battle>. determinative adds an implication of giving a fixed character or direction <the determinative factor in the court's decision>. definitive applies to what is put forth as final and permanent <the definitive biography>.