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English definition of “ill”

ill

adjective     /ɪl/
NOT HEALTHY A2 not feeling well, or suffering from a disease: critically/seriously ill Her mother was too ill to travel. Mark had been feeling ill for a couple of days.Not fit and healthyThin or slender (of people)
BAD [always before noun] formal bad: ill health He suffered no ill effects from his fall. → See also ill at easeSerious and unpleasantNot attractive to look atInformal words for bad
(Definition of ill adjective from the Cambridge Learner's Dictionary © Cambridge University Press)

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