👉 In mathematics and physics, a "unbounded" quantity or variable is one that cannot be measured or defined in terms of any finite number of real numbers. This means that it has no upper limit or bound on how large or small it can get. For example, if we define the term "volume" as the amount of space contained within a three-dimensional object, then it would not be unbounded because we cannot measure it without specifying how much space is inside a three-dimensional shape. Similarly,
