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.
Infants who are too young to be vaccinated are at the most risk of contracting life-threatening cases of whooping cough, the California Department of Public Health told The Sacramento Bee in an email. Hannah Poukish, Sacbee.com, 12 May 2025 The vast majority of cases, 41, involve patients who were not vaccinated, not fully vaccinated for their age, or received a dose after being exposed to measles. Robert A. Cronkleton, Kansas City Star, 8 May 2025 After a follow-up period of six years on average, vaccinated people were 23 percent less likely to have cardiovascular issues like heart attack and stroke than individuals who didn’t get vaccinated, according to findings published in the European Heart Journal. Emily Kay Votruba, EverydayHealth.com, 8 May 2025 Measles is so infectious that 95% of the population must be vaccinated to protect the community, a concept called herd immunity. Rebecca Schein, The Conversation, 7 May 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 19 May. 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

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