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[dih-sahy-siv] /dɪˈsaɪ sɪv/
having the power or quality of deciding; putting an end to controversy; crucial or most important:
Your argument was the decisive one.
characterized by or displaying no or little hesitation; resolute; determined:
The general was known for his decisive manner.
indisputable; definite:
a decisive defeat.
unsurpassable; commanding:
a decisive lead in the voting.
Origin of decisive
1605-15; < Medieval Latin dēcīsīvus, equivalent to Latin dēcīs(us) (see decision) + -īvus -ive
Related forms
decisively, adverb
decisiveness, noun
nondecisive, adjective
nondecisively, adverb
nondecisiveness, noun
predecisive, adjective
predecisively, adverb
1. conclusive, final. 2. firm. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for decisiveness
Contemporary Examples
Historical Examples
  • He avoids long words and complicated phrases even when well educated and speaks with directness and decisiveness.

    How to Analyze People on Sight Elsie Lincoln Benedict and Ralph Paine Benedict
  • "You must leave her," she urged, with a new touch of decisiveness.

    Jennie Gerhardt Theodore Dreiser
  • "Facts is that the whole thing is completely gooly-washed up," stated Mr. Orne, with an oracle's decisiveness.

  • There was a decisiveness about the Major's tones not to be misunderstood.

  • His thoughts had at times great energy and decisiveness in this direction.

    Children of the Soil Henryk Sienkiewicz
  • My firmness and decisiveness have made Marie reveal the pale ocean of her eyes.

    Woman Magdeleine Marx
  • How strange is this matter of the glamour, and its decisiveness in awakening love by its presence, or leaving it cold by absence!

    The Drama of Love and Death Edward Carpenter
British Dictionary definitions for decisiveness


influential; conclusive: a decisive argument
characterized by the ability to make decisions, esp quickly; resolute
Derived Forms
decisively, adverb
decisiveness, noun
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
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Word Origin and History for decisiveness



1610s, from Medieval Latin decisivus, from Latin decis-, past participle stem of decidere (see decide). Related: Decisively; decisiveness.

Online Etymology Dictionary, © 2010 Douglas Harper
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