Antonym: indecisive. Similar words: decision, derisive, precise, precisely, imprecise, decide, decide on, passive. Meaning: [dɪ'saɪsɪv] 
adj. 1. determining or having the power to determine an outcome 2. unmistakable 3. characterized by decision and firmness 4. forming or having the nature of a turning point or crisis.
adj. 1. determining or having the power to determine an outcome 2. unmistakable 3. characterized by decision and firmness 4. forming or having the nature of a turning point or crisis. 
Random good picture Not show
31 It is the chief executive's opinion which is ultimately decisive.
32 These results could prove decisive in establishing the criminal's identity.
33 This decisive defeat puts them out of contention for this year's championship finals.
34 After losing this decisive battle, the general was forced to concede.
35 The United States gained a decisive victory under his command.
36 He should give way to a younger, more decisive leader.
37 The army won the decisive victory that changed the course of the war.
38 Business leaders demanded immediate and decisive action to end the dispute.
39 By streamlining operations, they took the proper, decisive action.
40 He supplied the cross for Scott's decisive goal.
41 This country needs strong, decisive leadership.
42 Again, their fast bowlers put in decisive performances.
43 I thought I might win something decisive with her.
44 I listened to his decisive footfalls approach me.
45 He could and did play a decisive role.
46 Would-be lovers belch or hiccup at decisive moments.
47 Ultimately, though, human beings are the decisive factor.
48 It was a decisive moment in his career.
49 Suddenly Newland Archer felt himself impelled to decisive action.
50 In the future, aircraft will be the decisive factor.
51 Our industrial base proved decisive in the conflict.
52 Important though this visit was as a political signpost,(http://sentencedict.com/decisive.html) a far more decisive meeting was to follow.
53 We are still waiting for Jim to make up his mind. I wish he would be more decisive.
54 What proved decisive, however, was part of the hidden agenda of unemployment.
55 It may still avoid one, by luck or by a decisive further tightening now.
56 As each of his seemingly decisive threats vanished like a mirage before his eyes Karpov once again sank into serious time pressure.
57 Tranmere's reply was instant and decisive, Bishop volleying the winner from a free kick.
58 Miller's third and decisive goal came from a McAlonen free-kick which found Simon White in position to score.
59 Nothing was resolved and Athelstan felt he had failed to take a decisive role.
60 For the better part of the next forty years they were to be the decisive restraints.
More similar words: decision, derisive, precise, precisely, imprecise, decide, decide on, passive, massive, deceive, pervasive, offensive, effusive, persuasive, obtrusive, defensive, deceptive, excessive, extensive, undeceive, recessive, expensive, exclusive, regressive, aggressive, impressive, responsive, progressive, exclusively, inquisitive.