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Definition of invalid noun from the Oxford Advanced Learner's Dictionary

invalid

noun
 
/ˈɪnvəlɪd/
 
/ˈɪnvəlɪd/
 (old-fashioned, often offensive)
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  1. a person who needs other people to take care of them, because of illness that they have had for a long time
    • She had been a delicate child and her parents had treated her as an invalid.
    This term is now considered offensive, because it suggests that a sick person is somehow ‘not valid’ and worth less than a healthy person.Topics Health problemsc2
    Word Originnoun mid 17th cent. (as an adjective in the sense ‘infirm or disabled’): a special sense of invalid (adjective), with a change of pronunciation.
See invalid in the Oxford Advanced American Dictionary
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indeed
adverb
 
 
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