1. not yet having been ascertained or determined - of undetermined species • Ant: determined • Similar to: unexplained 2. not brought to a conclusion; subject to further thought - an open question - our position on this bill is still undecided - our lawsuit is still undetermined • Syn: open, undecided, unresolved • Similar to: unsettled 3. not precisely determined or established; not fixed or known in advance - of indeterminate age - a zillion is a large indeterminate number - an indeterminate point of law - the influence of environment is indeterminate - an indeterminate future • Syn: indeterminate • Ant: determinate (for: indeterminate) • Similar to: cost-plus, open-ended • See Also: inconclusive, indeterminable, undeterminable, uncertain • Derivationally related forms: indeterminateness (for: indeterminate)