名词

1. 疾病;(动植物的)病害
A disease is an illness which affects people, animals, or plants, for example one which is caused by bacteria or infection.

2. （尤指社会某一群体的）弊病，积习，恶习
You can refer to a bad attitude or habit, usually one that a group of people have, as a disease.

1. an impairment of health or a condition of abnormal functioning