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English definition of “invalid”

invalid

noun [C]     /ˈɪn.və.lɪd/ old-fashioned
someone who is sick and unable to take care of himself or herself, especially for a long time : Is the invalid in bed ?Handicap and the disabledPeople who receive medical treatment
(Definition of invalid noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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