American English

Definition of decisive adjective from the Oxford Advanced American Dictionary

     

    decisive

     adjective
    adjective
    NAmE//dɪˈsaɪsɪv//
     
     
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  1. 1 very important for the final result of a particular situation a decisive factor/victory/battle/action Climate was a decisive factor in establishing where the tournament should be held. She has played a decisive role in the peace negotiations. a decisive step (= an important action that will change a situation) toward a cleaner environment Thesaurusessentialvital crucial critical decisive indispensableThese words all describe someone or something that is extremely important and completely necessary because a particular situation or activity depends on them.essential extremely important and completely necessary, because without it something cannot exist, be made, or be successful:Experience is essential for this job.vital essential:The police play a vital role in our society.essential or vital?These words have the same meaning but there can be a slight difference in tone. Essential is used to state a fact or an opinion with authority. Vital is often used when there is some anxiety felt about something, or a need to persuade someone that a fact or an opinion is true, right, or important. Vital is less often used in negative statements:It was vital to show that he was not afraid. Money is not vital to happiness.crucial extremely important because a particular situation or activity depends on it:It is crucial that we get this right.critical extremely important because a particular situation or activity depends on it:Your decision is critical to our future.crucial or critical?These words have the same meaning but there can be a slight difference in context. Critical is often used in technical matters of business or science;crucial is often used to talk about matters that may cause anxiety or other emotions.decisive of the greatest importance in affecting the final result of a particular situation:She played a decisive role in the peace negotiations.indispensable essential; too important to be without:This database has become an indispensable resource in our research.Patterns essential/vital/crucial/critical/decisive/indispensable for something essential/vital/crucial/critical/indispensable to something essential/vital/crucial/critical that… essential/vital/crucial/critical to do something a(n) essential/vital/crucial/critical/decisive/indispensable part/role/factor of vital/crucial/critical/decisive >importance> absolutely essential/vital/crucial/critical/decisive/indispensable
  2. 2able to decide something quickly and with confidence decisive management The government must take decisive action on gun control. opposite indecisive
  3. Word Familydecide verbdecision noun (indecision)decisive adjective (indecisive)undecided adjective
 
adverb She shook her head decisively.
See the Oxford Advanced Learner's Dictionary entry: decisive