'invalid' in a sentence
Learn how to use 'invalid' with 5 example sentences.
- invalid adjective
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: no longer valid
: having no cogency or legal force
- invalid noun
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: someone who is incapacitated by a chronic illness or injury
- invalid verb
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: force to retire, remove from active duty, as of firemen
: injure permanently
Her father became an invalid as a result of a heart attack.
The password you have entered is invalid.
The contract, if you were forced to sign it, is invalid.
As of tomorrow, this e-mail address will be invalid.
Do I look like an invalid?