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  1. Dictionary
    booster
    /ˈbuːstə/

    noun

    • 1. a device for increasing electrical voltage or signal strength.
    • 2. the first stage of a rocket or spacecraft, used to give initial acceleration and then jettisoned.

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  2. dictionary.cambridge.org › dictionary › englishBOOSTER | English meaning - Cambridge Dictionary

    BOOSTER definition: 1. something that improves or increases something or makes it stronger: 2. a person who…. Learn more.

  3. www.merriam-webster.com › dictionary › boosterBooster Definition & Meaning - Merriam-Webster

    : a substance or dose used to renew or increase the effect of a drug or immunizing agent. especially : booster shot. Synonyms. advocate. advocator. apostle. backer. champion.

  4. www.dictionary.com › browse › boosterBOOSTER Definition & Meaning | Dictionary.com

    booster. / bo̅o̅ ′ stər /. An additional dose of an immunizing agent, such as a vaccine or toxoid, given at a time period of weeks to years after the initial dose to sustain the immune response elicited by the first dose. Tetanus, diphtheria, and measles vaccines are commonly given in booster doses.

  5. dictionary.cambridge.org › us › dictionaryBOOSTER | definition in the Cambridge English Dictionary

    BOOSTER meaning: 1. something that improves or increases something or makes it stronger: 2. a person who…. Learn more.

  6. www.collinsdictionary.com › dictionary › englishBOOSTER definition and meaning | Collins English Dictionary

    A booster is something that increases a positive or desirable quality. It was amazing what a morale booster her visits proved. Praise is a great confidence booster. 2. countable noun. A booster is an extra engine in a machine such as a space rocket, which provides an extra amount of power at certain times.

  7. www.thefreedictionary.com › boosterBooster - definition of booster by The Free Dictionary

    1. a person or thing that supports, assists, or increases power or effectiveness. 2. (Astronautics) Also called: launch vehicle the first stage of a multistage rocket. 3. (Electronics) radio television. a. a radio-frequency amplifier connected between an aerial and a receiver to amplify weak incoming signals.

  8. www.oxfordlearnersdictionaries.com › definition › englishbooster noun - Definition, pictures, pronunciation and usage...

    a device that gives extra power to a piece of electrical equipment. an extra small amount of a vaccine that is given to increase the effect of one given earlier, for example to protect you from a disease for longer. a tetanus booster. Topics Healthcare c2.

  9. www.vocabulary.com › dictionary › boosterBooster - Definition, Meaning & Synonyms | Vocabulary.com

    If you’re a big fan and promoter of something or someone, you're a booster. Go team! A booster provides support, like a kid’s booster seat, a follow-up dose of medicine, or a booster rocket that launches the Space Shuttle.

  10. dictionary.cambridge.org › dictionary › learner-englishBOOSTER | meaning - Cambridge Learner's Dictionary

    BOOSTER definition: 1. something that makes you feel happier or more confident 2. an engine on a spacecraft that gives…. Learn more.

  11. www.dictionary.com › browse › boosterBOOSTER Definition & Usage Examples | Dictionary.com

    Medicine/Medical.Also called booster dose, booster shot. a dose of an immunizing substance given to maintain or renew the effect of a previous one.