not in a state of good or normal health; in an unsound, weak, or morbid condition.

symptomatic of or resulting from bad health

an unhealthy pallor.

not conducive to good health; unhealthful

Night air was formerly considered unhealthy.

morally bad, harmful, or contaminating

unhealthy examples for the young.

dangerous; risky

Asking questions in this neighborhood can be unhealthy.