1. not in good health; sick or showing signs of poor health
2. harmful to one’s health
3. not normal or natural; showing signs of mental or emotional problems

Examples

• The patient looked pale and unhealthy.
• Smoking is an unhealthy habit.
• Fast food is often unhealthy if eaten regularly.
• She had an unhealthy obsession with celebrity gossip.
• The unhealthy work environment caused stress for employees.
• His unhealthy lifestyle included no exercise and poor diet.
• The relationship showed unhealthy patterns of control.