in·de·ter·mi·nate / ˌindiˈtərmənit/ • adj. not certain, known, or established: the date of manufacture is indeterminate. ∎ left doubtful; vague: many felt that the ending rendered the story incomplete, or at least indeterminate. ∎ (of a judicial sentence) such that the convicted person's conduct determines the date of release. ∎ Math. (of a quantity) having no definite or definable value. ∎ Med. (of a condition) from which a diagnosis of the underlying cause cannot be made: indeterminate colitis. ∎ Bot. (of a plant shoot) not having all the axes terminating in a flower bud and so producing a shoot of indefinite length. DERIVATIVES: in·de·ter·mi·na·cy / -nəsē/ n. in·de·ter·mi·nate·ly adv. in·de·ter·mi·nate·ness n.