Definition of “booster seat” - English Dictionary

british dictionary

“booster seat” in British English

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booster seatnoun [ C ]

uk /ˈbuː.stə ˌsiːt/ us /ˈbuː.stɚ ˌsiːt/ UK also booster cushion

(Definition of “booster seat” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)