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English definition of “ill”

ill

adjective  /ɪl/ us  

ill adjective (NOT HEALTHY)

(comparative worse, superlative worst) having a disease or feeling as if your body or mind has been harmed by not being able to work as it should: I felt ill, so I went home.

ill adjective (BAD)

[not gradable] bad: Did you experience any ill effects from the treatment?

ill

adverb [not gradable]  /ɪl/ us  

ill adverb [not gradable] (BADLY)

badly, with great difficulty, or certainly not: They could ill afford to lose all that money.

ill

noun [C usually plural]  /ɪl/ us  

ill noun [C usually plural] (PROBLEM)

a problem or difficulty: We thought we could solve all the community's ills and we have failed.
(Definition of ill from the Cambridge Academic Content Dictionary © Cambridge University Press)
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