1. The trait of resoluteness as evidenced by firmness of character or purpose
   "a man of unusual decisiveness"
   - decision 
2. The quality of being final or definitely settled
   - finality, conclusiveness

Derived forms: decisivenesses

See also: conclusive, decisive, inconclusive

Type of: definiteness, determinateness, firmness, firmness of purpose, resoluteness, resolution, resolve

Antonym: indecisiveness

• disarming
• disarmingly
• disarrange
• disarranged
• disarrangement
• disarray
• disarrayed
• disarticulate
• disassemble
• disassembly
• disassociate
• disassociation
• disassortative mating
• disaster
• disaster area
• disastrous
• disastrously
• disavow
• disavowable
• disavowal
• disband
• disbandment
• disbar
• disbarment
• disbelief