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
With new guidelines officially in place as of early October, here's what to know about getting an initial COVID-19 vaccine or booster shot this fall.
—
Mary Walrath-Holdridge, USA Today, 23 Oct. 2025
President Donald Trump underwent his second annual physical examination of his current term on Wednesday after being diagnosed with a vein condition this summer, and received a COVID-19 booster shot.
—Naomi Lim, The Washington Examiner, 11 Oct. 2025
Stopping by at a pharmacy to get a COVID-19 booster shot this fall may be different, and more difficult, than previous years after changes to vaccine recommendations become more vague.
—Irene Wright, Miami Herald, 22 Sep. 2025
On Thursday and Friday, the members will be considering policies such as who should get the fall COVID-19 booster shot, and whether all babies should get the hepatitis B vaccine at birth.
—Pien Huang, NPR, 15 Sep. 2025
See All Example Sentences for booster shot
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.
Mary Walrath-Holdridge, USA Today, 23 Oct. 2025
President Donald Trump underwent his second annual physical examination of his current term on Wednesday after being diagnosed with a vein condition this summer, and received a COVID-19 booster shot.
—Naomi Lim, The Washington Examiner, 11 Oct. 2025
Stopping by at a pharmacy to get a COVID-19 booster shot this fall may be different, and more difficult, than previous years after changes to vaccine recommendations become more vague.
—Irene Wright, Miami Herald, 22 Sep. 2025
On Thursday and Friday, the members will be considering policies such as who should get the fall COVID-19 booster shot, and whether all babies should get the hepatitis B vaccine at birth.
—Pien Huang, NPR, 15 Sep. 2025
See All Example Sentences for booster shot
Cite this Entry
“Booster shot.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/booster%20shot. Accessed 4 Nov. 2025.
Copy CitationMedical 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
Ann Schrader, The Denver PostLove words? Need even more definitions?
Merriam-Webster unabridged
Share