This paper's goal is very simple, that of trying to look at the broad and multifaceted concept of uncertainty from a typically scientific point of view, namely, that consisting in representing concepts through numerical quantities. For the goal, it is supposed that the universe of discourse is amorphe, and that the basic treats of the meaning shown by the mother-predicate ‘uncertain’, from which it comes the concept of uncertainty, can be empirically captured in, at least, for what concerns its variability (...) between the elements of the universe of discourse. Once ‘measures of uncertainty’ are defined in the same way as measures of length, area, volume, randomness, electrical intensity, etc., were introduced, there are analyzed the two cases in which ‘uncertain’ is confused with ‘probable’ and ‘possible’, to see which restrictions they mean in the use of ‘uncertain’. What it is just attempted is to open a window towards a new, and more general way, of considering the term ‘uncertainty’. (shrink)