WordWeb Online

1. Not yet having been ascertained or determined
   "of undetermined species"
    
2. Not precisely determined or established; not fixed or known in advance
   "of undetermined age"
   - indeterminate
    
3. Not brought to a conclusion; subject to further thought
   "our lawsuit is still undetermined"
   - open, undecided, unresolved

See also: cost-plus, inconclusive, indeterminable, open-ended, uncertain, undeterminable, unexplained, unsettled

Antonym: determined

Encyclopedia: Undetermined