boos
ter
Plural
boosters
1
a rocket that gives a spacecraft or missile the extra power it needs to leave the Earth's atmosphere
2
an additional dose of vaccine required periodically in order to increase, maintain, or renew the effects of a previous one
A booster is an extra dose of a vaccine given to strengthen the immune response after the first doses. Boosters are typically given after the first vaccination series to ensure long-term protection against certain diseases. They help strengthen the body's defense and provide added protection against infections that may decrease over time or need extra support.
Synonyms:
3
an amplifier for restoring the strength of a transmitted signal
4
a thief who steals goods that are in a store
Synonyms:
6
a person who backs a politician or a team etc.
7
something that enables a person or thing to improve or increase