ɪndɪˈtɜː(ɹ)mɪnət 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 yet having been ascertained or determined of undetermined species 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