booster

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booster /ˈbuːstɚ/ noun
plural boosters
booster
/ˈbuːstɚ/
noun
plural boosters
Learner's definition of BOOSTER
[count]
: something that boosts someone or something: such as
: an action or substance that makes something stronger or more effective
: something that helps or encourages someone or something
: booster shot
US : someone who supports an idea or organization
: part of a rocket that provides force for the launch and the first part of the flight
see also booster seat
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