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.
Khurram Akram, technical director at Pakistan Federal Directorate of Immunization's, estimates that the actual percentage of girls vaccinated was around 70%. NPR, 9 Nov. 2025 With a long tradition of vaccine development and massive immunization campaigns in the 1960s-1990s which were often implemented by the military, Brazil’s public health managers vaccinated more than 10 million children for polio in a single day in 1983. Adriana Brasileiro, Miami Herald, 7 Nov. 2025 The veterinary hospital advised pet owners to vaccinate their pets yearly, adding that all dogs are at risk of canine parvovirus. Julia Marnin, Charlotte Observer, 6 Nov. 2025 The hospital had previously required Adaline to be vaccinated against COVID-19 and the flu in order to be put on the list, which her parents weren't willing to do. Victoria Moorwood, Cincinnati Enquirer, 6 Nov. 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 14 Nov. 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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