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English definition of “unhealthy”

unhealthy

adjective     /ʌnˈhelθi/
CAUSE ILLNESS B1 likely to damage your health: Eating too much is unhealthy.Not fit and healthyThin or slender (of people)
ILL B1 not strong, and likely to become sick: She looks pale and unhealthy.Not fit and healthyThin or slender (of people)
NOT NORMAL not normal and slightly unpleasant: an unhealthy interest in weaponsStrange, suspicious and unnatural
(Definition of unhealthy adjective from the Cambridge Learner's Dictionary © Cambridge University Press)

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