invalid noun definition in Injuries topic from the Oxford Advanced Learner's Dictionary

invalid

 noun: Injuries topic
BrE /ˈɪnvəlɪd/ ; NAmE /ˈɪnvəlɪd/ ; BrE /ˈɪnvəliːd/ ; NAmE /ˈɪnvəliːd/ 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. his invalid wife He was found guilty of murdering his invalid father. Her husband was an invalid and couldn’t come to the door to open it.