booster rocket

noun

1. a person who boosts; enthusiastic supporter
2. Elec. a device for controlling or varying the voltage in a circuit
3. Radio, TV an amplifier between the antenna and the receiver
4. any device that provides added power, thrust, or pressure
5. 1. any of the early stages of a multistage rocket
   2. launch vehicle
      also booster rocket
6. booster shot
7. Slang a thief, esp. a shoplifter