Longman Dictionary of Contemporary English homepage

unhealthy

adjective
     
Related topics: Illness and Disability
un‧health‧y comparative unhealthier, superlative unhealthiest
1 likely to make you ill:
unhealthy living conditions
2 not normal or natural and likely to be harmful:
an unhealthy relationship
unhealthy interest/obsession/fear etc
Gareth had an unhealthy interest in death.
3MI not physically healthy [= ill, sick]:
an unhealthy baby
4MI unhealthy skin, hair etc shows that you are ill or not healthy:
an unhealthy pale complexion
unhealthily adverb

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