Definition of booster noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈbuːstə(r)//
    ; NAmE NAmE//ˈbuːstər//
    Space travel, Medication
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  1. 1(also booster rocket) a rocket that gives a spacecraft extra power when it leaves the earth, or that makes a missile go further See related entries: Space travel
  2. 2a device that gives extra power to a piece of electrical equipment
  3. 3an extra small amount of a drug that is given to increase the effect of one given earlier, for example to protect you from a disease for longer a tetanus booster See related entries: Medication
  4. 4a thing that helps, encourages or improves somebody/something a morale/confidence booster
  5. 5(especially North American English) a person who gives their support to somebody/something, especially in politics a meeting of Republican boosters
See the Oxford Advanced American Dictionary entry: booster

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