Definition of booster shot
: 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.
First Known Use of booster shot
BOOSTER SHOT Defined for English Language Learners
Definition of booster shot for English Language Learners
: an extra amount of a substance (called a vaccine) that is injected with a needle into a person or animal to help protect against a particular disease
Medical Definition of booster shot
Seen and Heard
What made you want to look up booster shot? Please tell us where you read or heard it (including the quote, if possible).