Meaning of “disease” - Learner’s Dictionary

disease

noun [ C, U ] us uk /dɪˈziːz/

B1 an illness caused by an infection or by a failure of health and not by an accident:

heart disease
an infectious disease

More examples

diseased adjective

affected by a disease:

a diseased lung

(Definition of “disease” from the Cambridge Learner’s Dictionary © Cambridge University Press)