də̇ˈsīsiv, dēˈs-, -ēv also -ˈsīz- or -əv adjective
Etymology: French décisif, from Middle French decisif, from Latin decisus + Middle French -if -ive
1. : having the power or quality of deciding : putting an end to
a decisive controversy
: conclusive
we shall win a complete and decisive victory over the forces of evil — Sir Winston Churchill
2. : marked by or displaying decision : resolute , determined
the clarity that comes from the decisive mind of the man of direct action — J.P.Wood
3. : that is beyond doubt : unmistakable , unquestionable
a decisive superiority
Synonyms: see conclusive