verb (used with object), vac·ci·nat·ed, vac·ci·nat·ing.
- to inoculate with the vaccine of cowpox so as to render the subject immune to smallpox.
- to inoculate with the modified virus of any of various other diseases, as a preventive measure.
verb (used without object), vac·ci·nat·ed, vac·ci·nat·ing.
- to perform or practice vaccination.
- (of a person or animal) not having been inoculated with a vaccine
- to inoculate (a person) with a vaccine so as to produce immunity against a specific disease
v.1803, back-formation from vaccination. Related: Vaccinated; vaccinating. v.
- To inoculate with a vaccine in order to produce immunity to an infectious disease such as diphtheria or typhus.