Open English Wordnet
Adjectives
(a)indeterminate, undeterminednot 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”
(s)indeterminateof uncertain or ambiguous nature“the equivocal (or indeterminate) objects painted by surrealists”
(s)indeterminate(of a quantity) having no definite value, as an equation that cannot be solved“0/0 is an indeterminate form”