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[vak-suh-neyt] /ˈvæk səˌneɪt/ Medicine/Medical
verb (used with object), vaccinated, vaccinating.
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), vaccinated, vaccinating.
to perform or practice vaccination.
Origin of vaccinate
First recorded in 1800-10; back formation from vaccination
Related forms
prevaccinate, verb (used with object), prevaccinated, prevaccinating.
revaccinate, verb (used with object), revaccinated, revaccinating.
unvaccinated, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for unvaccinated
Contemporary Examples
Historical Examples
  • 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.

    The Disentanglers Andrew Lang
  • 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.

  • Of five unvaccinated dogs, all succumbed to inoculation, by trepanning, of the brain.

    Louis Pasteur Ren Vallery-Radot
British Dictionary definitions for unvaccinated


(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
Derived Forms
vaccinator, 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
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Word Origin and History for unvaccinated



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

Online Etymology Dictionary, © 2010 Douglas Harper
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unvaccinated in Medicine

vaccinate vac·ci·nate (vāk'sə-nāt')
v. vac·ci·nat·ed, vac·ci·nat·ing, vac·ci·nates
To inoculate with a vaccine in order to produce immunity to an infectious disease such as diphtheria or typhus.

vac'ci·na'tor n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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