booster shot

noun

: a supplementary dose of an immunizing agent administered as an injection

called also booster, booster dose

Examples of booster shot in a Sentence

He had to get two booster shots at his latest checkup.
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.
Health experts suggest getting an annual booster shot to prevent these illnesses. Marley Malenfant, Austin American-Statesman, 17 Sep. 2024 Key Takeaways There is no official recommendation for a summer COVID booster shot. Korin Miller, Verywell Health, 5 June 2024 Further increasing the likelihood of infection is the fact that most people who have been vaccinated are far removed from their last COVID-19 booster shot. Rong-Gong Lin Ii, Los Angeles Times, 1 July 2024 Even among the highest-risk group, individuals 75 and older, just 36 percent received the booster shot in the fall and winter. Leana S. Wen, Washington Post, 4 July 2024 See all Example Sentences for booster shot 

Word History

First Known Use

1944, in the meaning defined above

Time Traveler
The first known use of booster shot was in 1944

Dictionary Entries Near booster shot

Cite this Entry

“Booster shot.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/booster%20shot. Accessed 17 Dec. 2024.

Kids Definition

booster shot

noun
: an extra dose of an immunizing agent given to maintain or restore the effects of previously established immunity

Medical Definition

booster shot

noun
: a supplementary dose of an immunizing agent administered as an injection
… the state is requiring older children to have additional booster shots for measles, mumps and rubella.Ann Schrader, The Denver Post
see booster, booster dose

More from Merriam-Webster on booster shot

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!