›a special substance that you take into your body to prevent a disease, and that contains a weakened or dead form of the disease-causing organismvaccinate
/ˈvæk·səˌneɪt/v[T]›Our children have been vaccinated for measles and other childhood diseases.vaccination
/ˌvæk·səˈneɪ·ʃən/n[C]›Most states require all children to receive the vaccination before beginning elementary school.