booster meaning and definition

BOOSTER noun

Definition of booster (noun)

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