indeterminate

adj. uncertain, indefinite, unclear, ambiguous; indecisive, undecided, unsettled

Indeterminate has a variety of meanings in mathematics:Indeterminate (variable)Indeterminate equationStatically indeterminateIndeterminate formIt is also a term in botany and gardening:Indeterminate growthIt is also used in philosophy to describe the shortcomings of definition:Indeterminacy (Philosophy)
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Adjective
1. 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"
(synonym) undetermined
(antonym) determinate
(similar) cost-plus
(see-also) inconclusive
2. having a capacity for continuing to grow at the apex; "an indeterminate stem"
(antonym) determinate
(similar) racemose
(classification) botany, phytology
3. of uncertain or ambiguous nature; "the equivocal (or indeterminate) objects painted by surrealists"
(similar) equivocal, ambiguous
4. not capable of being determined; "the indeterminate number of plant species in the jungle"
(similar) indeterminable, undeterminable
5. not leading to a definite ending or result; "an indeterminate campaign"
(similar) inconclusive

adj. indeterminate, undecided, ambiguous

(a.)
Not determinate; not certain or fixed; indefinite; not precise; as, an indeterminate number of years.