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.

Origin of vaccinate

First recorded in 1800–10; back formation from vaccination
Related formspre·vac·ci·nate, verb (used with object), pre·vac·ci·nat·ed, pre·vac·ci·nat··vac·ci·nate, verb (used with object), re·vac·ci·nat·ed, re·vac·ci·nat·ing.un·vac·ci·nat·ed, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for unvaccinated

Contemporary Examples of unvaccinated

Historical Examples of unvaccinated

  • The mortality in the unvaccinated is between 40 and 50 per centum.

  • Six unvaccinated children died from the effects of the disease.

    Norfolk Annals

    Charles Mackie

  • You are brooding over the fate of the young, the fair, the p. 188beloved—the unvaccinated.

  • Of eight unvaccinated dogs, six succumbed to the intravenous inoculation of rabic matter.

    Louis Pasteur

    Ren Vallery-Radot

  • The twenty-five vaccinated sheep resisted the infection, the twenty-five unvaccinated died of splenic fever within fifty hours.

British Dictionary definitions for unvaccinated


  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
Derived Formsvaccinator, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for unvaccinated



1803, back-formation from vaccination. Related: Vaccinated; vaccinating.

Online Etymology Dictionary, © 2010 Douglas Harper

unvaccinated in Medicine


  1. To inoculate with a vaccine in order to produce immunity to an infectious disease such as diphtheria or typhus.
Related formsvacci•na′tor n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.