1. the condition of being ill or unhealthy
2. nausea; the feeling that you are going to vomit
3. a particular type of illness or disease

Examples

• She missed work due to sickness.
• The sickness spread quickly through the school.
• Motion sickness made the car ride unbearable.
• He felt waves of sickness after eating the spoiled food.
• The doctor diagnosed a rare sickness.
• Morning sickness is common during pregnancy.
• The sickness kept him bedridden for days.