morbidity

noun

1. 1

   The quality of being unhealthful or diseased, sometimes including the cause.

2. 2

   The quality of being morbid; an attitude or state of mind marked by gloom.

3. 3

   The incidence of a disease, as a rate of a population which is affected.

4. 4

   An occurrence of illness or disease, or a single symptom of that illness.

5. 5

   Adverse effects caused by a medical treatment such as surgery.

6. 6

   The sickness rate of a population.