booster

noun
UK: /ˈbuːstər/
US: /ˈbuːstər/

  1. Something that increases power or strength.

    1. I need a booster to start my car. [ ] [ ]
    2. The team received a morale booster after the victory. [ ] [ ]

  2. An additional dose of a vaccine to strengthen immunity.

    1. I got a booster shot for the flu. [ ] [ ]
    2. Health officials recommend getting a COVID-19 booster annually. [ ] [ ]

  3. A fan or supporter who actively promotes something.

    1. He is a big booster of the local team. [ ] [ ]
    2. She's a vocal booster for environmental protection policies. [ ] [ ]

Synonyms

fan supporter amplifier enhancer promoter
booster verb

  1. To increase or strengthen something.

    1. The win will booster our confidence. [ ] [ ]
    2. The new policy will booster the economy, experts predict. [ ] [ ]

  2. To promote something enthusiastically.

    1. She boosters her brand on social media. [ ] [ ]
    2. The company boosters its new product with a major ad campaign. [ ] [ ]
booster adjective

  1. Providing an additional increase or support.

    1. This is a booster pump for water. [ ] [ ]
    2. A booster dose is required after a few months. [ ] [ ]

Frequently Asked Questions

The word "booster" in English means: Something that increases power or strength., An additional dose of a vaccine to strengthen immunity., A fan or supporter who actively promotes something..

The phonetic transcription of "booster" is /ˈbuːstər/ in British English and /ˈbuːstər/ in American English. Click the 🔊 button to hear both pronunciations.

Synonyms for "booster": fan, supporter, amplifier, enhancer, promoter.

Example usage of "booster": "I need a booster to start my car.". More examples on the page.