Meaning of “infection” - Learner’s Dictionary

infection

noun [ C, U ] us uk /ɪnˈfekʃən/
Extra Examples
a viral infectionthe body's defences against infectionAntibiotics will clear up the infection.Cold weather may lower the body's resistance to infection.She's receiving treatment for a lung infection.

B2 a disease in a part of your body that is caused by bacteria or a virus:

an ear/throat infection

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