Meaning Of The Word Invalid

Real Dictionary

What's the definition of Invalid? Find Invalid meanings, definitions and more at the Real Dictionary online.

Invalid Meaning

Invalid Definition
Invalid Definition

What's The Definition Of Invalid?

invalid
adjective: An invalid argument or conclusion is wrong because it is based on a mistake.
adjective: If an action, procedure, or document is invalid, it cannot be accepted, because it breaks the law or some official rule.
countable noun: An invalid is someone who needs to be cared for because they have an illness or disability.

invalid in American English 1
not well; weak and sickly; infirm
adjective: unable to care for oneself due to infirmity or disability
intransitive verb: to become an invalid
noun: an infirm or sickly person
transitive verb: to affect with disease

invalid in American English 2
not valid; having no force; null or void
adjective: not valid; without force or foundation; indefensible

invalid in British English 1
to cause to become an invalid; disable
adjective: incapacitated or disabled by injury, sickness, etc
noun: a person with disablement or chronic ill health

invalid in British English 2
adjective: not valid; having no cogency or legal force

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