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booster definition

☆ booster (bo̵̅o̅s′tər)

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
    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

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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