Definition of immunization noun from the Oxford Advanced Learner's Dictionary



(British English also -isation) noun
BrE BrE//ˌɪmjunaɪˈzeɪʃn//
; NAmE NAmE//ˌɪmjunəˈzeɪʃn//
[uncountable, countable]
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the act of protecting a person or an animal from a disease, especially by giving them an injection (1) of a vaccine an immunization programme to prevent epidemics compare inoculation, vaccination