The common usage of the word validity relates to the veracity and/or legitimacy of a concept or idea, for or against.To describe something as valid means that it is considered to be accurate and reliable in terms of either conceptual content or specific information. The issue of validity is discussed in context with both the overall subject and specific pieces of information, statements or assertions in relation to a subject.
Examples of Validity:
I really have to question the validity of an invoice written on a paper napkin.|
There's no doubt about the validity of his passport, it's just that he happens to be a different person.