booster seat

noun
🔊/ˈbuːstə siːt/
🔊/ˈbuːstər siːt/
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  1. a seat that you put on a car seat, or on a chair at a table, so that a small child can sit higher幼儿加高座椅,幼儿加高坐垫(可放在车座或椅子上)Topics Transport by car or lorryc2