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Word of the Day Tuesday, June 9, 2026

booster

/ˈbuːstər/ noun, verb · British & US
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What does booster mean?

noun, verb

A device or substance that increases the power or effectiveness of something, or a person who enthusiastically supports or promotes something. A booster can also be a verb, meaning to increase the power or effectiveness of something.

Example

"The rocket's booster engines helped it reach orbit."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for booster

Antonyms of booster

Rhymes with booster

Etymologically related