booster shot

1. 1.

   an additional dose that makes sure the first dose was effective

   Synonymsboosterbooster doserecall dose

   Broaderdose

Questions about booster shot

What does booster shot mean?

booster shot means "an additional dose that makes sure the first dose was effective".

What is another word for booster shot?

Close synonyms include booster, booster dose, recall dose. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.