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1. Not in or exhibiting good health in body or mind
   "unhealthy ulcers"
    
2. Detrimental to health
   "The climate is unhealthy";
   - insalubrious, unhealthful
    
3. Not conducive to good health
   "an unhealthy diet of fast foods"; "an unhealthy climate"

Derived forms: unhealthier, unhealthiest

See also: angry, arthritic, asthmatic, bad, blebby, blistery, bloated, bloodshot, cankerous, carbuncled, carbuncular, carious, caseous, chilblained, colicky, creaky, cytomegalic, dehydrated, diseased, distended, dropsical, edematous, enlarged, flatulent, foaming, foamy, frail, frothing, gangrenous, gassy [informal], health, icteric, ill, inflamed, inflammatory, ingrowing, ingrown, intumescent, jaundiced, membrane-forming, membranous, mental, morbid, mortified, pathologic, pathological, peaky [Brit, informal], proinflammatory, pro-inflammatory, puffy, rheumatic, rheumatoid, rheumy, sallow, sick, sickly, sore-eyed, sunburned, sunburnt, swollen, tumescent, tumid, turgid, ulcerated, ulcerous, unfit, unhealthful, unsound, unwholesome, varicose, wellness, wheezing, wheezy, windburned, windburnt, yellow

Antonym: healthy

Encyclopedia: Unhealthy