vaccinateEnglishOxford New American Dictionaryvaccinate /ˈvaksəˌnāt, ˈvæksəˌneɪt / ▸ verb [with object] treat with a vaccine to produce immunity against a disease; inoculate: all the children were vaccinated against diphtheria. – DERIVATIVES vaccinator /ˈvaksəˌnādər, ˈvæksəˌneɪdər / noun