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Definitions

vaccine

[vak-seen, vak-seen, -sin] / vækˈsin, ˈvæk sin, -sɪn /


NOUN
injection
Synonyms






Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Could a patient sue a doctor who counsels against the measles vaccine in the midst of an outbreak?

From Slate • Mar. 31, 2026

"She regained a lot of mobility and function" after receiving a custom mRNA vaccine along with powerful immunotherapy in December, he said.

From Barron's • Mar. 30, 2026

The "short answer is we don't know for sure" what actually led to the reduction in size of Rosie's biggest tumour, said Pall Thordarson, director of UNSW's RNA institute which created the vaccine.

From Barron's • Mar. 30, 2026

Pfizer’s Lyme vaccine missed the mark in a study, complicating its quest for approval.

From The Wall Street Journal • Mar. 27, 2026

Robert Oppenheimer and World War II. Salk found a vaccine that prevented polio, and Oppenheimer helped create the bombs that were dropped on Japan and ended the war.

From "The Fourteenth Goldfish" by Jennifer L. Holm