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