illness

/ˈɪlnəs/
noun
  1. A disease or period of sickness affecting the body or mind.
    • Mental illness affects millions of people around the world.
    • She missed a week of school due to a serious illness.
    • The doctor said his illness was caused by a virus.
  2. The state of being ill or unhealthy.
    • He was in good health before the sudden onset of illness.
    • The company offers paid leave for illness.
    • Good nutrition can help prevent illness.