What is morbid?

Answer 1

The term 'morbidity' has a few different senses or meanings:

1: the relative incidence of a particular disease;

2: an abnormally gloomy or unhealthy state of mind;

3: the quality of being unhealthful and generally bad for you

Medically, morbidity relates to the incidence or prevalence of disease in a locality (e.g. morbidity rate).
When one uses the word morbidity, one typically is talking about the incidence of a disease. Morbidity is the medical term for a disease and is used mainly by doctors and investigators.

Answer 2

It pertains to disease, or a condition likely to cause disease, such as--> He is morbidly obese.

Can also mean an unhealthy disposition in thinking, such as--> He has a morbid fascination with the occult.