What does decisive mean?
Decisive is an adjective with two closely related senses. First, it describes something that settles an issue or produces a definitive result: a decisive victory ends a contest, and a decisive factor is one that determines the outcome. Second, it characterizes a person who makes decisions quickly, firmly, and without hesitation — a quality widely admired in leaders, managers, and anyone acting under pressure. The word carries strongly positive connotations, implying clarity of judgment and effectiveness, and it contrasts with 'indecisive,' which suggests wavering and uncertainty. Derived from the Latin verb caedere, meaning 'to cut' or 'to strike down,' decisive shares its root with words like decide, incisive, and concise, all of which evoke cutting through ambiguity to reach something sharp and clear. It is standard across formal and informal English throughout the English-speaking world, and it appears often in political, military, sporting, and business contexts, where outcomes and leadership styles matter most.
adjectiveSettling an issue or producing a definite result; having the power to determine an outcome conclusively. Also describes a person able to make decisions quickly and confidently.
- (of a result, action, or event) settling an issue conclusively; producing a definite outcome.
- (of a person) having or showing the ability to make decisions quickly and confidently.
"Her decisive intervention in the final minutes of the debate settled the matter once and for all."
"The team's decisive win secured their place in the final."
"In a crisis, people look to leaders who are calm and decisive."
A single 'decisive' battle can end a war — the word itself comes from Latin caedere, 'to cut,' as in cutting an argument short.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of decisive
Decisive entered English in the early 17th century, borrowed from French décisif, which derives from the Medieval Latin decisivus. Its ultimate root is the Latin verb decidere, formed from de- ('off, away') plus caedere ('to cut'), so that to decide originally meant to cut off alternatives. The same root gives English related words such as decision, incisive, concise, and precision.
Related word forms
How decisive is actually used
Standard in both formal and informal registers. When applied to outcomes ('a decisive victory') it emphasizes finality; when applied to people it is generally complimentary, praising resolve and clarity.
Easily confused with decisive
'Incisive' describes sharp, clear thinking or expression, while 'decisive' refers to settling matters or making firm choices.