Not precisely determined, determinable, or established: a person of indeterminate age.
Not precisely fixed, as to extent, size, nature, or number: an indeterminate number of plant species in the jungle.
Lacking clarity or precision, as in meaning; vague: an indeterminate turn of phrase.
Not fixed or known in advance: an indeterminate future.
Not leading up to a definite result or ending: an indeterminate campaign.
Botany Not terminating in a flower and continuing to grow at the apex: an indeterminate inflorescence.
[Middle English, from Latin indēterminātus : in-, not; see in-1 + dēterminātus, determined; see determinate.] in'de·ter'mi·nate·ly adv., in'de·ter'mi·nate·ness, in'de·ter'mi·na'tion (-nā'shən) n.