Definition of Booster

Noun: booster boos-tu(r)

A person who backs a politician or a team etc.
"all their boosters came out for the game";
- supporter, protagonist, champion, admirer, friend
Someone who is an active supporter and advocate
- promoter, plugger
A thief who steals goods that are in a store
- shoplifter, lifter
An amplifier for restoring the strength of a transmitted signal
- booster amplifier, booster station, relay link, relay station, relay transmitter
The first stage of a multistage rocket
- booster rocket, booster unit, takeoff booster, takeoff rocket
An additional dose that makes sure the first dose was effective
- booster dose, booster shot, recall dose