Final answer:
An undefined value in mathematics represents a missing value or a value without a specific assigned value.
Step-by-step explanation:
The value undefined represents an undefined value and can be thought of as a missing value.
In mathematics, when a value is undefined, it means that it does not have a specific assigned value. This could occur when dividing by zero or when trying to take the square root of a negative number. An example of an undefined value is 0/0, which results in an indeterminate form.