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"
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"
Not determined; not settled; not decided.
"The jury returned a verdict of undetermined regarding the cause of the fire, leaving the investigation open for further inquiry."