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Word of the Day Wednesday, June 10, 2026

vaccine

/ˈvæksɪn/ noun · British & US
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What does vaccine mean?

noun

A preparation of killed or attenuated microorganisms, such as bacteria or viruses, administered to produce or increase immunity to a disease. A vaccine is a biological preparation that provides active acquired immunity to a particular infectious disease.

Example

"The doctor recommended a flu vaccine to protect against the seasonal outbreak."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for vaccine

Rhymes with vaccine

Etymologically related