[ vak-suh-neyt ]
/ ˈvæk səˌneɪt /

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.

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. 2019

Examples from the Web for vaccinate

British Dictionary definitions for vaccinate


/ (ˈvæksɪˌneɪt) /


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 vaccinate



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

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for vaccinate


[ văksə-nāt′ ]


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.