C1adjective2K

Decisive

UK /["/dɪˈsaɪsɪv/"]/US /["/dɪˈsaɪsɪv/"]/

Definition

very important for the final result of a particular situation

In simple words: Able to make choices quickly and confidently.

Examples

  • a **decisive factor/victory/battle**
  • 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)* towards a cleaner environment
  • It is the chief executive's opinion which is ultimately decisive.
  • Gettysburg was the decisive battle of the Civil War.
  • Morrison scored the decisive goal in the 75th minute of the game.
  • decisive management
  • The government must take **decisive action** on gun control.

Usage notes

Use 'decisive' in contexts where someone is making strong and clear decisions. It is more suitable in formal and business settings. Avoid using it in casual conversations where the meaning may be diluted.

Grammar pattern

decisive + noun

Memory hint

Sounds like 'decide-sieve' — think of a sieve filtering out uncertainties and only letting firm decisions through.

Collocations

  • be
  • prove
  • potentially
  • ultimately

Synonyms

  • resolute
  • determined
  • unwavering
  • conclusive
  • definitive

Antonyms

  • indecisive
  • hesitant
  • uncertain

Common mistakes

  • Confused with 'decisively' (adverb) — learners might use the wrong form in sentences.
  • Overusing the word to describe minor decisions, which makes it sound exaggerated.
  • Mixing up with 'decide' — 'decisive' describes the quality, not the action.