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English definition of “infirm”

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infirm

adjective uk   /ɪnˈfɜːm/ us    /-ˈfɝːm/ formal
ill or needing care, especially for long periods and often because of old age: She was too elderly and infirm to remain at home.

infirm

noun [plural] uk   /ɪnˈfɜːm/ us    /-ˈfɝːm/ formal
the infirm people who are ill for long periods: The old and the infirm are the most susceptible to this disease.
(Definition of infirm from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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