booster seat

noun

: a portable seat that is placed on or attached to a chair or an automobile seat in order to raise a child to a higher position

… they should use a booster seat until they are 8 years old or at least 4 feet, 9 inches tall. Only after that can they ride in the front seat, and even then the back is always safer.

—Denise Milosevich

She's too big for a high chair, but needs to sit on her knees to keep her head fully above the dining room table. And she doesn't want a booster seat. She'll boost herself, thank you very much.

—Dave Manley

called also booster chair

Examples of booster seat in a Sentence

Recent Examples on the Web

With a maximum weight limit of 50 pounds rear-facing and 120 pounds for the booster seat, your child will use this for years. —Chaunie Brusie, Rn, Parents, 24 Jan. 2025

This car seat tray can be used in the car, on airplanes and with booster seats. —Nora Colomer, Fox News, 20 Feb. 2024

For example, Cullen Griffin said the high chairs and booster seats, which might typically be hard plastic, were cushioned (the line has a partnership with baby product brand Chicco). —Nathan Diller, USA TODAY, 24 Dec. 2024

Three booster seats that had been in the back seat were also missing, according to Rock Island Police Chief Timothy McCloud. —Meredith Deliso, ABC News, 16 Jan. 2025

Word History

First Known Use

1954, in the meaning defined above

Rhymes for booster seat

• bittersweet
• celestite
• incomplete
• indiscreet
• marguerite
• obsolete
• overeat
• overheat
• parakeet
• stillingfleet
• superheat
• amit