immunizePronunciation: /ˈɪmjʊnʌɪz/ (also immunise)Translate immunize | into French | into German | into Italian | into Spanish Definition of immunize verb [with object] make (a person or animal) immune to infection, typically by inoculation:the vaccine is used to immunize children against measlesDerivatives immunizationPronunciation: /-ˈzeɪʃ(ə)n/ noun immunizer noun immunize in other Oxford dictionaries Definition of immunize in the US English dictionary