immunize Syllabification: (im·mu·nize)Pronunciation: /ˈimyəˌnīz/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: /ˌimyəniˈzāSHən/ noun immunizer noun immunize in other Oxford dictionaries Definition of immunize in the British & World English dictionary