verb (used with object), vac·ci·nat·ed, vac·ci·nat·ing.

  1. to inoculate with the vaccine of cowpox so as to render the subject immune to smallpox.
  2. 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.

  1. to perform or practice vaccination.


  1. (of a person or animal) not having been inoculated with a vaccine


  1. 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.

  1. To inoculate with a vaccine in order to produce immunity to an infectious disease such as diphtheria or typhus.

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