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decisive

American  
[dih-sahy-siv] / dɪˈsaɪ sɪv /

adjective

  1. An image of the word decisive as defined by having the power or quality of deciding; putting an end to controversy; crucial or most important.

    having the power or quality of deciding; putting an end to controversy; crucial or most important.

    Your argument was the decisive one.

    Synonyms:
    final, conclusive
  2. characterized by or displaying no or little hesitation; resolute; determined.

    The general was known for his decisive manner.

    Synonyms:
    firm
  3. indisputable; definite.

    a decisive defeat.

  4. unsurpassable; commanding.

    a decisive lead in the voting.


decisive British  
/ dɪˈsaɪsɪv /

adjective

  1. influential; conclusive

    a decisive argument

  2. characterized by the ability to make decisions, esp quickly; resolute

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of decisive

First recorded in 1605–15; from Medieval Latin dēcīsīvus, equivalent to Latin dēcīs(us) ( see decision) + -īvus adjective suffix ( see -ive)

Explanation

If you make decisions quickly, you are someone who is decisive. A decisive event can settle something, like a war. People who are wishy-washy are the opposite of decisive: being decisive means you don't waffle or take forever to make up your mind, and then you stick by what you decided. People admire politicians, coaches, and friends who are decisive. In sports, if a home run won the game, that was the decisive run. When you reach a crisis point in life — when things are going to change one way or the other — you've reached a decisive moment.

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Vocabulary lists containing decisive

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

"The European Commission must guarantee the office political backing, operational independence, resources, and technical staff to quickly deliver decisive enforcement," Benifei told AFP.

From Barron's ● Oct. 6, 2026

Moderating inflation creates an opportunity for gold, but economic resilience and elevated yields are preventing a decisive breakout, Massabni adds.

From The Wall Street Journal ● Oct. 2, 2026

"He scored against Spain so he has decisive actions and he's defending his shirt and his position. He does it on the highest level and he's a very important player."

From BBC ● Oct. 2, 2026

The decisive Game 3 of the series is Thursday in Las Vegas.

From Los Angeles Times ● Sep. 30, 2026

Thus the Cartesian distinction between mind and matter turned out to be less sharp and decisive than at first it had seemed.

From "The Invention of Science" by David Wootton

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