"booster" in the noun sense
1. supporter, protagonist, champion, admirer, booster, friend
a person who backs a politician or a team etc.
"all their supporters came out for the game"
"they are friends of the library"
2. promoter, booster, plugger
someone who is an active supporter and advocate
3. booster, shoplifter, lifter
a thief who steals goods that are in a store
4. booster, booster amplifier, booster station, relay link, relay station, relay transmitter
an amplifier for restoring the strength of a transmitted signal
5. booster, booster rocket, booster unit, takeoff booster, takeoff rocket
the first stage of a multistage rocket
6. booster, booster dose, booster shot, recall dose
an additional dose that makes sure the first dose was effective
Source: WordNet® (An amazing lexical database of English)
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