immunization immunity theory • immunize · · · Info · Definitions · Synonyms · Characters · · immunization · · Text Latin · · Script 12 · · Length 5 · · Syllables Definitions · · · (noun) the act of making immune (especially by inoculation). Synonyms: immunisation. · · Noun Definition 1 Synonyms · · · immunisation · · Synonym 1 Characters · · a latin small letter a U+0061 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F t latin small letter t U+0074 u latin small letter u U+0075 z latin small letter z U+007A