Not conducive to good health; harmful or detrimental to physical well-being. Eating too much junk food is considered an unhealthy habit.
Characterized by poor physical or mental health. He looked pale and unhealthy after being sick for a week.
Not beneficial or advisable; likely to cause harm or problems. The company has an unhealthy work environment that leads to high employee turnover.
Displaying or arising from a morbid or excessive interest in something unpleasant or undesirable. She developed an unhealthy fascination with crime documentaries.