invalid
n.n. not legally or officially acceptable because it does not follow the rules. You use this to describe things like tickets, passwords, or arguments that are not correct or true.
n. null and void; having no legal force or factual basis. Often describes documents, logic, or data that fails to meet required criteria.
Your password is invalid, so please try again.
The judge ruled that the contract was invalid because one of the signatures had been forged.
The entire scientific study was deemed invalid after an independent audit discovered that the researchers had manipulated the raw data to support their initial hypothesis.
From in- + valid.
From Middle French invalide, from Latin invalidus (“infirm, weak”), from in- (“not”) + validus (“strong”).
Typically used as a predicative adjective following a linking verb or as an attributive adjective before a noun.
This ticket is not validlyThis ticket is invalidLearners sometimes try to use an adverbial form to express lack of validity instead of the adjective 'invalid'.