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Webster 1828 Edition

Adj.

unhelth'y.

Wanting health; wanting a sound and vigorous state of body; habitually weak or indisposed; as an unhealthy person.

Unsound; wanting vigor of growth; as an unhealthy plant.

Sickly; abounding with disease; as an unhealthy season or city.

Insalubrious; unwholesome; adapted to generate diseases; as an unhealthy climate or country.

Morbid; not indicating health.

unhealthy ‎(comparative unhealthier, superlative unhealthiest)

characterized by, or conducive to poor health
The villagers lived in unhealthy surroundings.
sick or ill
He was an unhealthy child.
tending to corrupt
He liked unhealthy reading material.
characterized by disturbed mental health
He had an unhealthy interest in fire.

conducive to poor health