vaccinate

verb

vac·​ci·​nate ˈvak-sə-ˌnāt How to pronounce vaccinate (audio)
vaccinated; vaccinating

transitive verb

: to administer a vaccine to usually by injection

intransitive verb

: to perform or practice vaccination
vaccinator noun

Examples of vaccinate in a Sentence

We vaccinate all the animals that come to our shelter.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The agency also recommended American travelers get vaccinated against rabies before heading to either destination. Michael Cappetta, Travel + Leisure, 9 Dec. 2025 Anti-vaccine activists, the HHS secretary among them, have spent years stoking unfounded fears about mRNA vaccines; doing so has almost certainly resulted in otherwise preventable deaths among those who refused to get vaccinated. Benjamin Mazer, The Atlantic, 8 Dec. 2025 For decades, the federal government has advised vaccinating all babies at birth to protect them from liver infections, which medical experts say is guidance that research shows has cut the infection rate by 99%. Adam Thompson, CBS News, 7 Dec. 2025 But the three members who opposed the change noted that there was little evidence of any harm from the vaccine, even among newborns, and that no longer vaccinating newborns would increase the harm for children who would become vulnerable to dangerous liver conditions. Alice Park, Time, 6 Dec. 2025 See All Example Sentences for vaccinate

Word History

Etymology

earlier, "to inoculate with fluid from a cowpox pustule," back-formation from vaccination; in later extended sense, in part borrowed from French vacciner, verbal derivative of vaccin vaccine

First Known Use

1882, in the meaning defined at transitive sense

Time Traveler
The first known use of vaccinate was in 1882

Browse Nearby Words

Cite this Entry

“Vaccinate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vaccinate. Accessed 12 Dec. 2025.

Kids Definition

vaccinate

verb
vac·​ci·​nate ˈvak-sə-ˌnāt How to pronounce vaccinate (audio)
vaccinated; vaccinating
: to give a vaccine to usually by injection
vaccinator noun

Medical Definition

vaccinate

1 of 2 verb
vac·​ci·​nate ˈvak-sə-ˌnāt How to pronounce vaccinate (audio)
vaccinated; vaccinating

transitive verb

1
: to inoculate (a person) with cowpox virus in order to produce immunity to smallpox
2
: to administer a vaccine to usually by injection

intransitive verb

: to perform or practice vaccination

vaccinate

2 of 2 noun
vac·​ci·​nate ˈvak-sə-ˌnāt How to pronounce vaccinate (audio) -nət How to pronounce vaccinate (audio)
: a vaccinated individual

More from Merriam-Webster on vaccinate

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!