WordWeb Online

1. Characterized by lack of decision and firmness
   "an indecisive manager brought the enterprise to a standstill";
   - dithery [informal]
    
2. Not definitely settling something
   "a long and indecisive war"
    
3. Not clearly defined
   "indecisive boundaries running through mountains"

See also: hesitant, hesitating, inconclusive, indefinite, irresolute, on the fence, suspensive, undecided

Antonym: decisive

Encyclopedia: Indecisive